I've tried to color this about three times now and it all came out horrible, so I give up. Somebody else color this! I abjure it.
So, yeah, have some...well, they're not exactly more realistic, so I guess just differently-styled ponies. ...I made Twilight too large in proportion to Celestia, baw. :[eta:
If you want to take a crack at coloring it, here
is a version without the blur or tinting.