The hands are still a bit janky... but I will admit, if you showed off these pictures around 20'10 or so, they would be very convincing.

THE PIXELS ARE MISALIGNED!!!!!

Sonic's hands in the second, the line designs on the board are disappear and the shadows are inconsistent. Amy has the rubber at the bottom of her shoes but Sonic doesnt for some reason, also Sonic's last quill in the second is a bit short

But first glance they're pretty convincing, like Mystic said, 2010s AI or wouldnt even come to mind, probably wouldn't bat an eye at the inconsistencies and just call it fanmade

Amy's shadow is shaped like a Yoshi

Amy and Sonic are facing the wrong way in the first picture.

Also, Sonic has no shadow, and Amy only has one in one of the panels.

Sonic and Amy are in a picture together. Period.