Macbook Pro 2.4 or 2.53??? - For some architecture work and graphic design

[qwerasdf]

I'll buy a new laptop to use for some architecture work and graphic design. For some program, ie. Photoshop , Sketchup , 3D Program (3dsmax-bootcamp or Maya-Mac OSX). Base on 9600GT for display adaptor.

Which CPU is better for rendering?

Macbook - Intel P8600 w/2.4 Ghz. 3MB Cache L2 Cache and Macbook 2.53 T9400 w/2.53 Ghz. 6 MB L2 Cache. Both are same on FSB 1066 mhz.

I've already heard that fast CPU can perform a short time for rendering. In this case P8600 and T9400 , A little bit different for clock speed. But L2 Cache are not same. 3MB and 6MB.

To save my budget. Is it worth for T9400? Or P8600 is enough.
- How to choose a CPU?
- L2Cache can help on rendering??? L2cache 3MB or 6MB. Is that mean it has 2x better performance???

Apple offer Macbook Pro 2.4 and 2.53.
For me, DDR3 Ram can be add later and I already have my Notebook HDD. And how about a size of GPU memory?

Can I feel a different from this two Macbook Pro?

Please give me some advise. Thanks.

 

[clyde2801]

Macworld has some benchmarking between these two and the 2.8 bto. I believe the programs you use would use every last processor cycle on the machines, so you probably would tell a difference.