I have both of these, but only enough parts to max out one of them. The positives I see:

Radius has internal fast SCSI and integrated video.

WGS 8150 has a tape drive, is a bit smaller, and it's a WGS.

Whichever one I end up using I will also put in a Sonnet G3 266, an ATTO SE IV D SCSI card and a ProTools Audio Card; even though the cable is the same I think I can only plug in my 442, and not my 888 interface.

I could go either way, are there any issues or problems I may have to deal with either???