Breville the Eye Q 850 Auto 2 Slice vs the Eye Q 870 Auto 4 Slice

The Breville the Eye Q 850 Auto 2 Slice and the Breville the Eye Q 870 Auto 4 Slice are from the same lineup, marketed for their use of optical sensors that track the color of your toast as it darkens. They both offer solid performance for everyday use, but with different benefits and drawbacks. Go for the 2 Slice if you don't need as much capacity, if you're short on space, or if toasting speed is your priority, since it toasts faster. Choose the 4 Slice if you need more capacity or if toasting evenness is more important to you, since it toasts both sides of the bread more evenly.