You be the judge. Aside from the extra memory, the CPU performace is nearly 200% better. 10.5.2 destroys 10.4.8. There is some minor lossage in disk performance because I’m using the onboard AHCI ports instead of JMicron ports, but wow…

Leopard is on the left, 10.48 AHCI is on the right. Leopard reports this machine as “Mac Pro”, and the 10.4.8 system reported it as a Developer Workstation. Also, before you complain that one system has more RAM than the other, neither of these systems were running much in the way of applications at the time of this test.

( Click for Xbench Stats )