Actually with dell you can upgrade your graphics card on the XPS, I just think a tech needs to come and do it for you, and it's only free once.. Alienware is user-upgradable yourself

The XPS got better benchmarks on a show on Tech TV I believe a really long time ago that compared a Hypersonic, Voodoo, Alienware, and Dell laptop .. The XPS is just...big, bulky, and uhm

lol
For a gaming laptop, it's obvious Alienware is the best, but there are other laptops out there you can get for less money with the same Specs, I just dont know how good those game compared to the Alienware, even with the same parts... lol