Here is Completed comparison of Pixel 7 and Pixel 6a which is best

If you are looking for buying pixel 7/6a,this could be very helpful for you

Pixel 7 comes in the price starting range of $599 while Pixel 6a is Just $449

Pixel 7 is Available in 128 / 256 GB and Pixel 6a also available in 128 GB

camera setup of pixel 6a is Rear  12.2 MP main+12 MP ultrawide and front 8MP

However the camera setup of pixel 7 is Rear 50MP wide +12 Ultrawide and front 10.8 MP

Battery specifications of pixel 7 is 4355 MAH and in pixel 6a is 4410 MAH

Boths are good as per specifications but Pixel 6a is much better in price range