Like i said before, the pixel art was better for this mod, many people says that the sprites are good, but here are some of my points and opinions about them after i checked them in detail:
The mid-front walk and run sprites looks weird, but when is super, this doesn't happen, it's just a bug or something else?
The lack of shading makes him very lifeless and look like Junio for some reason.
Some of his sprites aren't very fluid, in my opinion this makes the mod bad, because isn't fluid like the pixel art one, it made Hesse Sonic look more faster and dynamic ,(if you see the Sonic Mania animation, its more fluid there). Also the old running sprite was better than the new one.
My final thought about this is that the handdrawn style fits MORE better OVA Sonic, it's faithful to the original and makes a difference between the srb2 style. Using the pixel art on Hesse fits very well on him, (like i said) it makes him more fluid and better. I'm not saying the handdrawn style is bad, i've seen many characters using this style and it worked very well, but on Hesse feels weird and not very good like the pixel art.