Screen Resolutions

This may seem like a stupid question because I'm new to flight simulator, but is a 1600x1200x32 better than a 1200x1200x16? I have tried both but can't really spot a difference...
Flight Simulator and other chat
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https://forums.simviation.com/phpBB3/viewtopic.php?f=12&t=31191
I was wondering too, until I saw his sig, His card is waaay overclocked. Remember congo that a stock 6600GT wouln't preform like that
Cheers
Cameron
I think congo and I have kind of simular systems except that I have a 3.0 GHz CPU, and when I flew a Boeing 737 Experience over London in the same weather conditions as congo used above and made a simular screenshot I had a framerate at over 40 fps, and that's over London.
Here is New York with everything pretty much maxed out in "building storms" weather.
I fot 256 Ram, Intel Celeron, Windows XP Pro, 1 gig (or less) of memory left, and i dont know what is my memory card specs, it is a STOCK Dell Inspirion 1150