Dell xps m1530 vs Asus GS1-B2

I am evaluating the Dell XPS 1530 versus the Asus GS1=B2. The Dell is about $750 - $1000 more expensive depending on how I configure it. The biggest difference I can find between the two is that the Dell has a T9300 processor, the Asus a T7700. The Dell comes with 4GB memory vs. 3GB for the Asus, but since I do not plan to use 64 bit OS, I do not think the extra GB matters. HD capacity and speed is the same, and essentially the rest of the components are the same if not similar. Asus has a 2 year warranty, Dell is 1.

Any advice on these two systems will be appreciated. Other than the processor, I cannot find anything that gives one machine a clear advantage over the other. Is the processor difference enough to justify the cost difference?

Thanks