Yep, there's definitely space to recover. One instance has a server using 350 of 350 assigned GB from VMware's perspective, but I can see more than 250GB free from the server's perspective.
The LUNs may be different. We migrated to a new storage system a while back, so all of them may be new. I hadn't considered that part. We're on Compellent now. Would that really somehow keep me from being able to manage the disk at the VMware level?