I had both scans recently. The results were odd. My overall spine average was identical in both, but the individual scores (L1, etc.) were wildly different. Somehow it all averaged out the same. The technician did tell me that people tend to do a little better with REMS. I honestly don't know what to think! I'll probably just stick to DEXA next year. REMS is so new, the doctors don't know anything about it.