Barefeats compared the new high-end MacBook Pro 2.6GHz Penryn and the previous model based on Santa Rosa clocked at 2.4GHz.
the performance gain is not marginal, and more important than the one expected from a CPU speed boost. With Cinebench, the CPU performance improved by 16% while using Motion as a benchmark, the performance improvement ranges from 23 to 32%.
So, one can clearly see the advantages of having Penryn processors in Macs, especially with their larger cache and support for SSE4 instruction set.
Lat but not least, the new high-end is faster but it is less power consuming and does not heat your legs as much as the previous model.
for complete review, please visit our friend: http://www.barefeats.com/mbpp01.html
[translation by Linathael]