Some people comment my style is like Nitty's, so I suppose my edit is like Nitty's. I circled what I did in green.

-Yours is too blocky, although people say his style is blocky, its not that blocky!
-The brightest color doesnt work in nitty's style, its just too bright, most of his colors are dull dull dull.
-Normally his outlines arent as dark as yours.
-I changed some anatomy problems, although the pixel itself confuse me.
I also recommend not copying the legs, each leg on everything has some differences you know.