Hi,
Yes this is the same version and you will see a big improvement in speed on your G5 running OSX.
Before the Universal Binary recompile could be done for the Intel Mac machines the development team had to recompile Combustion to the native XCode of OSX. Then we did a recompile for the Intel machines. The Intel based Mac machines will see the greatest speed improvement but anyone running OSX and Combustion 4 will also see a big difference because of the XCode recompile that had to take place first.
Ken LaRue
Autodesk Application Specialist
Combustion / Toxik
Combustion Training DVDs
http://www.thestreetproductions.com