what usage your gonna use it for? normal usage, surfing with some gaming or heavy gaming only? mostly at home or outstation? mostly on battery or plugged?

g53jw can handle most of the game on extreme setting while n53sn can handle most game too but some game only on high setting for smooth experience (example game that i tried is starcraft 2)

n53sn is lighter and less bulky to travel around compare to brick size of the g53jw with huge backside

n53sn multitasking and photoshoot will perform much better than g53jw (why not wait for g53jw sandy bridge?)

battery life n53sn will be better