Number of fingers is what does not change. The number of fingers thing was added for humour. You may notice that he has no extra fingers.

EDIT: made it a bit clearer in the earlier comment by adding brackets

The tip of his nose is really droopy.

Ravenclaw

Yes! 25 points to Ravenclaw!

Should I reveal the last one? It is extremely unlikely for anybody to find it.

No. Another hint please.

Ok this hint might just make you find out by guessing randomly.

Made him less like Vernon. Find out how.

His neck is longer???

Nope.

Are his eyes wider?

Yeah i thought that too he looks traumatized