**** Go here for new version of UBER VSA ****
While working with the Celerra VSA (link here)I have noticed one big distinction form the OVA version versus the Workstation 7 version:
Workstation:
OVA:
So if you look at the yellow boxes you can see that the OVA will deploy much slimmer config as well as utilize the paravirtual SCSI controller.
If you are looking for a bit quicker and slicker VSA in your vSphere lab then I would defintely go with the OVA setup. Make sure your vCenter is running at least U1 to import (http://nickapedia.com/2010/04/20/celerra-vsa-ova-import-bug/).
.nick

