I'm late to the party but
your sprite animating style is great, better than the SMBZ everyone compares every sprite animation to, ever, since it's inception.
You have a good sense of timing, and you do a great job of capturing sonic's personality and movements.
Don't let anyone tell you you're copying smbz, just keep doing your own thing. What do people really expect from sprites? they're all made the same way, so of course the animation is going to look similar, it's the IDEAS, that separate the sprite animators.
Good work man. One day you should translate your spriting skills into drawing frame by frame animation, I think you could pull it off.