Guys, what the fuck.
It's the same model, it wasn't altered at all to look like classic Sonic.
The spikes have the same size, the quill is still the same, and the pupils look black because that's how they look when they're zoomed out. The cell-shading with the spheric highlight was made to remind of classic Sonic's shading. The only thing that I can point out that might be different from the current design is that maybe they could have increased the top spike's size to remind more of it, but Sonic Rush's model had also a bigger top spike IIRC.
In fact it seems like Sonic's sprites are based off a high-poly version of Rush's model and with an effect to have that shading.
Classic Sonic for instance wouldn't have shoe soles, spikes aren't as big, and the top spike is the largest one, and the spikes from the bottom of his head are the smallest ones (not counting his spikes on his torso), and he also has a spheric torso. And even if there actually was a Classic Sonic alternative skin, then that'd be stupid because it'd still be the same game, if it comes out bad or if it comes out good. Although a mode that makes the HUDs, badniks designs, and the character designs change to the original ones would be actually a neat extra, but just a small extra.
It's the same model, it wasn't altered at all to look like classic Sonic.
The spikes have the same size, the quill is still the same, and the pupils look black because that's how they look when they're zoomed out. The cell-shading with the spheric highlight was made to remind of classic Sonic's shading. The only thing that I can point out that might be different from the current design is that maybe they could have increased the top spike's size to remind more of it, but Sonic Rush's model had also a bigger top spike IIRC.
In fact it seems like Sonic's sprites are based off a high-poly version of Rush's model and with an effect to have that shading.
Classic Sonic for instance wouldn't have shoe soles, spikes aren't as big, and the top spike is the largest one, and the spikes from the bottom of his head are the smallest ones (not counting his spikes on his torso), and he also has a spheric torso. And even if there actually was a Classic Sonic alternative skin, then that'd be stupid because it'd still be the same game, if it comes out bad or if it comes out good. Although a mode that makes the HUDs, badniks designs, and the character designs change to the original ones would be actually a neat extra, but just a small extra.