Rosetta 10.4.8 Is Faster

With my MacPro 3.0GHz, I have performed numerous benchmarks, running Photoshop filters with 10.4.7 and 10.4.8, times for completing the test are respectively 269s and 249.7s, just behind the value obtained with a PM G5 dual 2.5, 228.7s.
Results are compiler hereafter (in French) :
http://blog.clemmm.com/2006/04/10/macintel-et-photoshop-cs2/
When running the same benchmarking script via Bootcamp or parallels, the results are respectively 140.7s and 165.2s. If Parallels is an attractive solution, the Wacom tablet is unfortunately not supported
I still need to find ways to calibrate my display while running Parallels and set a dual screen system.