Which one is a better gaming laptop?

Hello,

I have shortlisted the following laptops:

Acer aspire 5625G-P944G75Mn
-AMD Phenom II Quad Core Mobile Processor P940 (1.7GHz, 2MB L2 cache)
-ATI Mobility Radeon HD 5650 (1024MB of dedicated DDR3 VRAM)

Acer aspire 5745G-7744G50Mn
-Intel Core i7-740QM processor (1.73GHz with Turbo Boost up to 2.93GHz, 6MB L3 cache)
-ATI Mobility Radeon HD 5650 (1024MB of dedicated DDR3 VRAM)

May I ask which one should I buy for better gaming experience? Another question, which is better, an i5 or i7 or AMD?

Thanks,
Eric
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