Bunk. Both games were developed for the 360 and its ~8yr old graphics hardware. Screen shots I've seen are very very similar. Witcher 2 brings modern hardware to its knees and actually delivers on the visuals too, unlike the CoD sequels that see system requirements jump 20% and look the same.
Edit -
With the decline of Bioware, is CDProject now the top RPG developer?
decline? are you smoking the good stuff today?
BW is shining like the sun right now.. TOR is a masterpiece of an RPG..
and ME3 is on the way..
BW messed up 1 game.. DA2.. and it was still a damn fun game.. and a great RPG.