There is a difference in price of £50, but that makes little difference to me. I would like to have the extra hard disk space on the more expensive tesco's model but am willing to sacrifice that if it is the case that the perfomance is more than slightly lower.
Go with the argos one, the gfx is better and the difference between the two laptop s is minute in processor speed
How do you figure? And don't say "because it has more VRAM". They are the exact same GPU. More VRAM will only help at high resolutions and using AA and AF during games and at 720p it's not going to make any difference. Look at any of the game benchmarks on the Tom's charts, pick a game at 1280x1024 (closest to what he will be running) and the difference between the same GPU with different amounts of VRAM will be negligible.
Most of the time at lower resolutions, your gaming experience will be capped by your CPU. So in this instance, the slightly faster CPU may provide more of a benefit than more VRAM.
Both laptops will perform close to each other,also 1GB VS 512MB won't make much of a difference.
I would go with the first one since it has a slightly better CPU because it has more cache,also it has more HDD too