Help on laptop specs please

[chutchy100]

Hi, just wondering if anyone could advise if the following combo is any good for games on a laptop, just to play in med detail of course. Will it run games like dragon age origins and Rift?

Intel i5 480m, Nvidia Geforce GT 420M, 4g DDR3, it is a dell xps

i have a desktop which has an ati radeon hd 4670, amd phenom II x 4 955 and 4g ddr2, will i get similar or worse performance?

Did a bit of searching but not quite sure about all the stats.

Any advise greatly apprecated.

Thanks