Radeon HD 7750 vs GeForce GTX550Ti

Which one would be a better fit? Both are about the same price, though 7750 was released a year after GTX550Ti. The only thing 550 has advantage in are the clocks, which are told to be twice as fast as 7750. Would that make any difference, significant or not?

These are the cards in consideration

Newegg.com - EVGA 01G-P3-1556-KR GeForce GTX 550 Ti (Fermi) FPB 1GB 192-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card
Newegg.com - ASUS HD7750-1GD5-V2 Radeon HD 7750 1GB 128-bit GDDR5 PCI Express 3.0 x16 HDCP Ready Video Card

Basically flip a coin. In some games the AMD is faster, and in others the Nvidia is. Good place to start is here,

Video Card Comparison - GPUReview.com

Check some of the reviews of the HD 7750 as most will also have the 550 Ti, and you can judge for yourself.

One big advantage that the HD 7750 has over the 550 Ti is it requires/uses about half the power, 55 W for the HD 7750 vs 116 W for the 550 Ti.

Yes, and I don't think it requires a power connector either, unlike 550

For me, I choose AMD for the Eyefinity feature that they offer. If you use 2 or more monitors, you can immerse your self in the game completely.

http://www.youtube.com/watch?v=a9iSPoG6sW8

Ok this is not really on topic, but the reason I created this thread was to make sure I've made the right decision. The thing is - I've already purchased EVGA GTX550Ti last week. I was actually thinking about returning it, and your comments only pushed me further towards RMAing the card. But today, while playing GTA IV I've noticed a very strange phenomenon. If you ever played the game, you know that when you change the graphics options, there is a fraction at the bottom of the screen, telling you how much RAM would be used with the intended settings. With my old GDDR5 1GB RHD5670 it was always limited to 970-something mb. The new GTX550Ti I ordered is also GDDR5 1GB. That's what it said in newegg description, that's what it said in the manual, and that's what it said on the box. But while playing GTA today, I was changing my visuals settings. and I noticed the game was no longer limited to 1GB. Instead, it read a much higher number, in 19-hundreds mb. I thought it was surely a mistake, and the game would crash if I went over 1GB. But nothing like that happened. I comfortably played the game using 1300-1400 mb of RAM, with very little lagging and pretty good FPS. I was shocked by that, immediately restarted the game, and it still worked at the same settings. Then I fired up the EVGA Precision tool that came along with the card and it further reassured my hopes.
So, here I am - my graphics card is somehow managing 2GBs of RAM, instead of 1. How is that possible??? Is it possible that they sent me a wrong card? I did do some overclocking in the same Precision tool, could that somehow change something?