This might be a minority experience but I used to use the Pixel 4a with the reader on the back and now the Pixel 8a with reader inside the display and I find th

This might be a minority experience but I used to use the Pixel 4a with the reader on the back and now the Pixel 8a with reader inside the display and I find the fingerprint reader of the 8a marginally faster and much more reliable. From an UX perspective I also find it slightly more practical on the front so I can unlock the phone without picking it up.