320/VGX vs. IBM RS/6000-730

[Lipman]

We are considering buying a 320/VGX or an IBM RS/6000-730.
Does anybody have any benchmark comparisons between the two
machines in terms of CPU and graphics speeds.  The benchmarks
should be based on real applications, not something mythical.
The systems we are looking at will have 64MB memory and about
2GB disk space.

Also, does anybody have any comparisons of the graphics speed
on either machine when useing GL versus Xwindows and PHIGS?

Thanks in advance, e-mail please

Bob Lipman