Whats a better video card ?

I didn't say that. The GTX 650 is fine but nothing amazing. The 2Gb just means it has twice the amount of video RAM. This doesn't effect the performance of the card greatly unless you are playing at very high resolutions. If you are an avid gamer then I would recommend a card like the Nvidia GTX 660 or better, or the ATI 7850 or better.
 
Its Like You are Asking

Which number is big
20.................................................................................gtx 650 1gb
40.................................................................................gtx 650 2gb
or
100.................................................................................gtx 680 2gb

Hope you got the numbers well.....
 


You resurrected an ancient and solved thread just to poke fun at OP? Sometimes figuring out what's going on in tech is not the easiest.

So following your logic the GTX 650 is better than the GTX 780.Heh