So other than the hard drive space, is it fair to say that none of these updats offer anything drastically significant over my existing late 2007/eary 2008 MPB (core 2, 2.2 ghz with 2 gigs of ram)
Core 2 Duo vs Core i5/i7:
- i5/i7 is about 20 - 30% faster across all applications
- i5/i7 offers Turboboost, where it automatically clocks the CPU higher if 1 core is not in use
- i5/i7 has HyperThreading, which makes it more optimized for multithreaded applications.
8600M GT vs GT 330M
- 32 processors vs 48 processors
- Same 128-bit bandwith bus
- Higher clock speeds on the GT 330M
- Overall about 50 - 60% better
(notebookcheck is not a reliable source in showing that the GT 330M is almost 2x better because also most of the 8600Ms tested used DDR2 memory, while Apple uses GDDR3 memory which makes the card about 30% faster)
So that's pretty much your answer in terms of CPU and Graphics Cards. It is a significant bump, like going from CD x1600 MBPs to C2D 8600M MBPs. However it's too little to be considered a jump.
If you want to see a jump, compare it to the HP Envy 15"
Core 2 Duo vs Core i7 Quad
- 2 cores vs 4 cores, nothing more to say
8600M GT vs ATI 5830
- The ATI 5830 is easily 2.5 times faster