Hi, I´m trying to decide whether to buy this laptop or this other one: http://www.amazon.com/ASUS-X550-15-Inch-Laptop-VERSION/dp/B00NGK7GHG/ref=cm_cr_pr_product_top?ie=UTF8

How different are the procesors? Am I going to tell the difference by just browsing the internet, startup time, temperature? Also, are the wireless cards diferent? How? I want to do some light gaming, but I am mostly concerned about good speakers and that it won't get slow if I have too many tabs open on firefox.