Like I said, there were only a few moments when I thought "Hey those look like CG!" in AOTC.
In ROTS I agree, they looked "real enough."
The only scene that was a little odd was the one when "Commander Cody" takes off his helmet. There's this really loud sound effect of the helmet coming off and it looks kind of cartoony for like a split second. Hard to explain, but it made me think ("did they CGI the armor on, or did they CGI his head onto a CG body?"). But overall there were fewer "Ah ha, CG!" moments in ROTS than in the other two prequels, or the special editions.