Vector's "REAL" counterpart looks more alligator than croc with the most obvious issues being the lack of visible lower teeth and a more rounded nose. The light green color is appropriate (alligators are a bit darker in tone) and they do, indeed, love themselves some purple accessories. Well... they specifically like something with red in the mix. If not red itself, crocs and gators alike will commonly go with some shade of purple or orange and maybe pair that with something neutral, like white or brown. Crocodylidae fashion is a serious matter and a far more important detail to incorporate into one's artistic interpretation of the reptiles than any of the biological traits.
REAL Sonic is cute.