The big differences I see between the systems are
AMD Phenom vs I5
8GB RAM vs 4 GB RAM
5400 RPM hdd vs 7200 RPM HDD
A nice comparison between the processors can be found here
. They are both comparable performance wise.
the 8 gb ram has a higher impact on games compared to the 7200 rpm hdd. (both can be upgraded later on) Judging only by specs I would say SPEC 1 is a little more suited towards gaming. However, SPEC 2 is more compact and might have longer battery life so I guess you have to decide if the laptop is going to be used a lot 'on the go' If yes SPEC 2 might prove a better choice. If portability is not an issue, Spec 1 has an advantage performance wise !