I'm considering between MBP 2.2 4gb ram and 2.4 2gb ram ( I'm planning to use it for rendering and make architecture 3d model) I don't know which one is better in limited budget
Get the 2.2, and be sure to upgrade the ram yourself. You won't notice the 2.2 vs. 2.4 difference unless you're constantly using 99% of *both* cores when you get your computer.
i woudl second thata s well, get the 2.4 and whenevr you get a chance upgrade to 4Gb ram later and if you can you shoudl do it yourself with aftermarket ram save a lot of money...
I don t really know exactly ow that would be teh maya rendering, but teh way i look at it, is, i can upgrade Ram if i want to, i can't just buy more cpu power, ram i can..
go with the 2.4. As a graphic artist i always try to get the best processor and graphics up front. ram can always be added later when cash in your change jar.