I think both of those cards you list above would be slower than his current card. Keep in mind that he is wanting to get a card for today's newer games (from his other thread). Games like F.E.A.R. etc. The cards you list above would have an extremely hard time running these types of games.
Original posted didn't really make it clear what he wants the card for in this thread, so I can't really blame you I just happened to have read his other thread.
I see now what you are talking about. I did not completely understand the specs of the cards. I knew to look at the installed memory and the type of RAM interface, but I did not understand the difference in GPU speed and RAMDAC speed. I did some research on the matter following your post and is is quite interesting. Next time I will be able to make a much more educated choice. Thanks.......