Hey,
I am planing on getting a new laptop.
I have narrowed it down to either

Dell Studio XPS 13 - Rs.64,109.45 (prior to tax)
Intel(R) Core(TM) 2 Duo Processor P8600 (2.40GHz/ 1066 FSB/ 3MB Cache
(Customized to add the 256MB NVIDIA® GeForce® 9500M-GE
and 4GB DDR3 Ram)

HP Pavilion dv4-1242tx Entertainment Notebook PC - Rs.53000(prior to tax)
Intel® Core™2 Duo Processor T6400 2.0 GHz, 2 MB L2 Cache, 800 MHz
(It has the 4GB DDR2 Ram and 512 MB NVIDIA GeForce 9200M GS card)

My Budget is up to 65K (can extend to 70K)

My Questions are

1: How much better is the Dell's processor?
2: DDR2 vs DDR3 Ram?
3: Comparing the Graphics cards on both?
4: Are there any other options that I can consider?

I will be buying either of these in about a week, so please post your replies asap.