doubleofive said:

Here is a nice comparison:

I think the I-SE's head may be off just a hair. And VI looks almost as dumb as I. Maybe he really was getting old, and his right eye broke in the year between V and VI.

Other issues that I've noticed with the CG Yodas:
- they have no chin (ESB Yoda has a very pronounced "clef-chin")

- the eyebrow ridge seems closer to the eyes

- they don't have lips, or rather, they seem to have no lower lip (ESB Yoda's lower lip is a bit fuller)