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Ninja Blender Duo with Auto-iQ BL642 vs Professional Plus Blender DUO with Auto-iQ

Which Blender Is Better?

    Top
    Main Differences
    Design
      DimensionsBuild QualityJar CapacityJar/Beaker MaterialsBladesLidPower CordIn The Box
    Performance
      Fibrous Ingredients (Small Batches)Fibrous Ingredients (Full Capacity)Crushed IceNut ButterNoiseBlade Speed
    Ease Of Use
      Controls And ProgramsCleaning
    Comments

Products

Ninja Blender Duo with Auto-iQ BL642
Ninja Professional Plus Blender DUO with Auto-iQ

Tested using Methodology v1.0

Updated Jan 06, 2025 06:11 PM

SEE PRICE
Amazon.com

Tested using Methodology v1.0.1

Updated Mar 11, 2026 01:59 PM

SEE PRICE
Amazon.com
Ninja Blender Duo with Auto-iQ BL642 Picture

Track

Ninja Professional Plus Blender DUO with Auto-iQ Picture

Track

Blender Type
Full Size Blender
Power
1,200 W
Hot Blending
No
Blender Type
Full Size Blender
Power
1,200 W
Portable
No
Hot Blending
No
  1. Recommended in 1 article:
  2. Quiet

Our Verdict

Ninja Blender Duo with Auto-iQ BL642

Ninja Professional Plus Blender DUO with Auto-iQ

The Ninja Blender Duo with Auto-iQ BL642 and the Ninja Professional Plus Blender DUO with Auto-iQ are similar blenders. The BL642 comes with a 72-ounce pitcher and three personal jars for single-serve smoothies, and the DUO comes with the same 72-ounce pitcher and only one personal jar. The DUO is quieter and makes a smoother blend with big batches of fibrous ingredients. Otherwise, they perform about the same.

GIFT THIS COMPARISON

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Variants

  • BL642 (Black)
  • BL640 (Black)
  • BN751 (Black)
  • BN750 (Black)

Review

See Ninja Blender Duo with Auto-iQ BL642 Review
See Ninja Professional Plus Blender DUO with Auto-iQ Review
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Check Price

Black
BL642
SEE PRICE
Amazon.com
Black
BN750
SEARCH
Amazon.com
Black
BL640
SEARCH
Amazon.com
Black
BN751
SEE PRICE
Amazon.com
Black/Silver
BL641
SEE PRICE
Amazon.com
Black
BN753TGT
SEARCH
Amazon.com
 
Black
DB751A
SEARCH
Amazon.com
Read more

Main Differences for
Multi-Purpose

Threshold 

0.10

Multi-Purpose 
 

6.9
7.0
No major differences between these blenders for multi-purpose. See full list of tests below.

Full Comparison

Design

Dimensions 
 

Box Picture 
 

Compare High-Res
Ninja Blender Duo with Auto-iQ BL642 Box Picture
Compare High-Res
Ninja Professional Plus Blender DUO with Auto-iQ Box Picture

Blender Type 
 

Full Size Blender
Full Size Blender

Portable 
 

No

Height 
 

17.8" (45.2 cm)
17.6" (44.6 cm)

Width  

7.6" (19.2 cm)
7.3" (18.5 cm)

Depth  

10.0" (25.5 cm)
8.7" (22.2 cm)

Weight 
 

8.8 lbs (4.0 kg)
8.2 lbs (3.7 kg)

Shaft Length (Immersion Blenders) 
 

N/A
N/A

Build Quality 
 

8.0
8.0

Build Quality Picture 
 

Compare High-Res
Ninja Blender Duo with Auto-iQ BL642 Build Quality Picture
Compare High-Res
Ninja Professional Plus Blender DUO with Auto-iQ Build Quality Picture

Feet  

Ninja Professional Plus Blender DUO with Auto-iQ Feet

Jar Capacity 
 

9.8
9.8

Main Jar Capacity 
 

72.0 oz (2,129 ml)
72.0 oz (2,129 ml)

Additional Jar Capacity 
 

32.0 oz (946 ml)
24.0 oz (710 ml)

Jar/Beaker Materials 
 

Jar Picture 
 

Compare High-Res
Ninja Blender Duo with Auto-iQ BL642 Jar Picture
Compare High-Res
Ninja Professional Plus Blender DUO with Auto-iQ Jar Picture

Optional Jar Picture 
 

Compare High-Res
Ninja Blender Duo with Auto-iQ BL642 Optional Jar Picture
Compare High-Res
Ninja Professional Plus Blender DUO with Auto-iQ Optional Jar Picture

Jar/Beaker Material 
 

BPA-Free Plastic
BPA-Free Plastic

Dishwasher Safe 
 

Yes
Yes

Blades 
 

Blades Picture 
 

Compare High-Res
Ninja Blender Duo with Auto-iQ BL642 Blades Picture
Compare High-Res
Ninja Professional Plus Blender DUO with Auto-iQ Blades Picture

Blade Type 
 

Sharp
Sharp

Blade Count 
 

6
6

Removable 
 

Yes
Yes

Dishwasher Safe 
 

Yes
Yes

Lid 
 

Lid Picture 
 

Compare High-Res
Ninja Blender Duo with Auto-iQ BL642 Lid Picture
Compare High-Res
Ninja Professional Plus Blender DUO with Auto-iQ Lid Picture

Two-Part Lid 
 

No
No

Lid Closing Type 
 

Lock Mechanism
Lock Mechanism

Power Cord  

Cable Picture 
 

Compare High-Res
Ninja Blender Duo with Auto-iQ BL642 Cable Picture
Compare High-Res
Ninja Professional Plus Blender DUO with Auto-iQ Cable Picture

Stow-Away Compartment 
 

Yes
Yes

Cord Length 
 

2.6 ft (0.8 m)
2.6 ft (0.8 m)

In The Box  

Bundle Picture 
 

Compare High-Res
Ninja Blender Duo with Auto-iQ BL642 Bundle Picture
Compare High-Res
Ninja Professional Plus Blender DUO with Auto-iQ Bundle Picture
Performance

Fibrous Ingredients (Small Batches) 
 

9.3
9.3

Fibrous Ingredients (Small Batches) Photo 
 

Compare High-Res
Ninja Blender Duo with Auto-iQ BL642 Fibrous Ingredients (Small Batches) Photo
Compare High-Res
Ninja Professional Plus Blender DUO with Auto-iQ Fibrous Ingredients (Small Batches) Photo

Jar Used 
 

Additional Jar
Additional Jar

Fibrous Ingredients (Small Batches) Video  

Fibrous Ingredients Processing 
 

8.5
8.5

Fibrous Ingredients Texture 
 

9.5
9.5

Fibrous Ingredients (Full Capacity) 
 

6.8
7.2

Fibrous Ingredients (Full Capacity) Photo 
 

Compare High-Res
Ninja Blender Duo with Auto-iQ BL642 Fibrous Ingredients (Full Capacity) Photo
Compare High-Res
Ninja Professional Plus Blender DUO with Auto-iQ Fibrous Ingredients (Full Capacity) Photo

Fibrous Ingredients (Full Capacity) Video  

Jar Used  

Main Jar
Main Jar

Fibrous Ingredients Processing 
 

6.0
6.0

Fibrous Ingredients Texture 
 

7.0
7.5

Crushed Ice 
 

10
10

Crushed Ice Photo 
 

Compare High-Res
Ninja Blender Duo with Auto-iQ BL642 Crushed Ice Photo
Compare High-Res
Ninja Professional Plus Blender DUO with Auto-iQ Crushed Ice Photo

Crushed Ice Video  

Crushed Ice Preparation 
 

10
10

Crushed Ice Texture 
 

10
10

Nut Butter 
 

8.1
8.4

Nut Butter Picture 
 

Compare High-Res
Ninja Blender Duo with Auto-iQ BL642 Nut Butter Picture
Compare High-Res
Ninja Professional Plus Blender DUO with Auto-iQ Nut Butter Picture

Nut Butter Video  

Nut Butter Preparation 
 

6.0
6.0

Nut Butter Texture 
 

9.5
10

Noise 
 

7.4
7.9

Noise @ Max Speed 
 

91.4 dB
88.8 dB

Noise Video  

Blade Speed 
 

Min Speed 
 

3,200 RPM
3,900 RPM

Power 
 

1,200 W
1,200 W

Max Speed 
 

4,600 RPM
4,900 RPM

Speed Adjustment Based On Jar Type 
 

Yes
No
Ease Of Use

Controls And Programs 
 

Control Panel 
 

Compare High-Res
Ninja Blender Duo with Auto-iQ BL642 Control Panel
Compare High-Res
Ninja Professional Plus Blender DUO with Auto-iQ Control Panel

On/Off Switch 
 

Yes
Yes

Speed Presets 
 

3
3

Hot Blending 
 

No
No

Speed Dial 
 

No
No

Pulse/Turbo Mode 
 

Yes
Yes

Programs 
 

4
2

Blending Time Indicator 
 

Yes
No

Programmable Timer 
 

No
No

Cleaning 
 

6.0
6.0

Self-Cleaning Video  

Cleaning Video  

Check Price

Black
BL642
SEE PRICE
Amazon.com
Black
BN750
SEARCH
Amazon.com
Black
BL640
SEARCH
Amazon.com
Black
BN751
SEE PRICE
Amazon.com
Black/Silver
BL641
SEE PRICE
Amazon.com
Black
BN753TGT
SEARCH
Amazon.com
 
Black
DB751A
SEARCH
Amazon.com
Back to Top

Ninja Blender Duo with Auto-iQ BL642

Ninja Professional Plus Blender DUO with Auto-iQ

Comments

  1. Comparison
 • Posted 2 years ago

Ninja Blender Duo with Auto-iQ BL642 vs Ninja Professional Plus Blender DUO with Auto-iQ: Main Discussion

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