Breville the Smooth Wave vs Panasonic NN-CD66NS: Which Microwave Is Better? - RTINGS.com

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Main Differences

Internal Capacity

Shallow Dish Heating Uniformity

Deep Dish Heating Uniformity

Products

Tested using Methodology v1.1

Updated Apr 17, 2026 07:23 PM

Tested using Methodology v1.1

Updated Mar 06, 2026 05:46 PM

Breville the Smooth Wave Picture

Panasonic NN-CD66NS Picture

Installation Countertop

Inverter Technology Yes

Convection Cooking No

Installation Countertop

Inverter Technology Yes

Convection Cooking Yes

Recommended in 3 articles:
Microwaves
Best Countertop
Small

Our Verdict

Breville the Smooth Wave

Panasonic NN-CD66NS

The Breville the Smooth Wave and Panasonic NN-CD66NS have different strengths. The Panasonic NN-CD66NS includes microwave, air fry, and broil functions, so you might prefer it if you're also in the market for an air fryer or want an alternative to your full-size oven. The Breville is just a microwave, but it heats food faster and has a bigger cooking chamber despite its more compact design. Its controls are also much easier to use.

Variants

the Smooth Wave (Brushed Stainless Steel)

NN-CD66NS (Stainless Steel)

Review

See Breville the Smooth Wave Review

See Panasonic NN-CD66NS Review

Check Price

Brushed Stainless Steel

the Smooth Wave

Stainless Steel

NN-CD66NS

Brushed Stainless Steel

the Smooth Wave

Stainless Steel

NN-CD66NS

Brushed Stainless Steel

the Smooth Wave

Stainless Steel

NN-CD66NS

Brushed Stainless Steel

the Smooth Wave

Stainless Steel

NN-CD66NS

Brushed Stainless Steel

the Smooth Wave

Stainless Steel

NN-CD66NS

Brushed Stainless Steel

the Smooth Wave

Stainless Steel

NN-CD66NS

Main Differences for

Everyday Use

Threshold

0.10

Everyday Use

8.4

7.4

Ease Of Use

9.2

7.2

Internal Capacity

7.0

6.5

Full Comparison

Everyday Use

8.4

7.4

Power

8.7

8.5

Design

Body

Microwave Dimensions Photo

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Breville the Smooth Wave Microwave Dimensions Photo

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Panasonic NN-CD66NS Microwave Dimensions Photo

Installation

Countertop

Countertop

Height

12.4" (31.4 cm)

13.0" (33.0 cm)

Width

20.4" (51.9 cm)

21.8" (55.3 cm)

Depth Without Handle

16.5" (42.0 cm)

18.0" (45.7 cm)

Depth With Handle

17.9" (45.4 cm)

18.0" (45.7 cm)

Power Cord Length

3.46 ft (1.06 m)

3.66 ft (1.12 m)

Internal Capacity

7.0

6.5

Cooking Chamber Photo

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Breville the Smooth Wave Cooking Chamber Photo

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Panasonic NN-CD66NS Cooking Chamber Photo

Advertised Chamber Volume

1.2 cu. ft. (34.0 L)

1.3 cu. ft. (36.8 L)

Turntable Diameter

12.4" (31.5 cm)

13.6" (34.5 cm)

Chamber Height

9.3" (23.7 cm)

6.8" (17.2 cm)

Chamber Width

13.9" (35.3 cm)

14.5" (36.9 cm)

Chamber Depth

14.7" (37.4 cm)

16.0" (40.7 cm)

Measured Chamber Volume

1.10 cu. ft. (31.3 L)

0.91 cu. ft. (25.8 L)

Show Text

Features

Control Panel Picture

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Breville the Smooth Wave Control Panel Picture

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Panasonic NN-CD66NS Control Panel Picture

Cooking Sensor

Yes

Yes

Convection Cooking

No

Yes

Add Time Button

Yes

Yes

Mute Sounds Button

Yes

Yes

Lock Controls Button

Yes

Yes

Show Text

Ease Of Use

9.2

7.2

Usability Video

Control Interface

Dials + Physical Buttons

Dials + Physical Buttons

# Of Actions For 3:00 At 100%

2

3

# Of Actions For 2:30 At 50%

3

8

Door Release

Handle

Button

In The Box

In The Box Photo

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Breville the Smooth Wave In The Box Photo

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Panasonic NN-CD66NS In The Box Photo

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Performance

Power

8.7

8.5

Microwave Power Graph

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Breville the Smooth Wave Microwave Power Graph

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Panasonic NN-CD66NS Microwave Power Graph

Inverter Technology

Yes

Yes

Advertised Microwave Output Power

1,200 W

1,250 W

Tested Heating Rate At 100% Power

701 W

687 W

In-Use Noise

8.5

8.8

Noise Video

Avg. Noise @ 100% Power

45.6 dBA

43.8 dBA

Shallow Dish Heating Uniformity

Marshmallow Heatmap

Compare High-Res

Breville the Smooth Wave Marshmallow Heatmap

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Panasonic NN-CD66NS Marshmallow Heatmap

Area Of Underheated Dinner Plate

100%

0%

Grayscale Range Dinner Plate

15

13

Area Of Underheated Turntable

67%

0%

Grayscale Range Turntable

18

13

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Deep Dish Heating Uniformity

Mashed Potato 100% Heatmap

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Breville the Smooth Wave Mashed Potato 100% Heatmap

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Panasonic NN-CD66NS Mashed Potato 100% Heatmap

Min. Food Temperature (100% Power)

90 °F (32 °C)

N/A

Food Temperature Range (100% Power)

96 °F (53 °C)

N/A

Mashed Potato 50% Heatmap

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Breville the Smooth Wave Mashed Potato 50% Heatmap

Compare High-Res

Panasonic NN-CD66NS Mashed Potato 50% Heatmap

Min. Food Temperature (50% Power)

114 °F (46 °C)

N/A

Food Temperature Range (50% Power)

77 °F (43 °C)

N/A

Show Text

Check Price

Brushed Stainless Steel

the Smooth Wave

Stainless Steel

NN-CD66NS

Brushed Stainless Steel

the Smooth Wave

Stainless Steel

NN-CD66NS

Brushed Stainless Steel

the Smooth Wave

Stainless Steel

NN-CD66NS

Brushed Stainless Steel

the Smooth Wave

Stainless Steel

NN-CD66NS

Brushed Stainless Steel

the Smooth Wave

Stainless Steel

NN-CD66NS

Brushed Stainless Steel

the Smooth Wave

Stainless Steel

NN-CD66NS

Breville the Smooth Wave

Panasonic NN-CD66NS

Comments

Comparison

• Posted 1 month ago

Breville the Smooth Wave vs Panasonic NN-CD66NS: Main Discussion

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