we are planning to use both: the PC's and the MAC's.
Our Problem: We noticed, that the solution with Worker and Enterprise Server doesn't work for this case at all. Because the Worker doesn't have any Path-Mapping-Mechanism (in opposite to CatDv Pro). So when the Worker runs on a MAC Server it cannot edit any clips in the Database, that have MS-DOS paths (\\folder\file). The same case in the other way around. The guys from Squarebox promised me a solution with the next release of Worker. I'm waiting desperately for it.
The performance is indeed different. In some cases the PC version seams to be faster. But on the other hand it crashes more often.