Yes, I think you are right.
I saw the file in software upgrade's folder and it is the same file (same md5sum and name) I have flashed using RSD Lite 5.6.
Well, here the differences I saw:
- As casaroli commented, some translations were fixed.
- GPS is 100x faster. I think they really enable AGPS. I can see the option in GPS Status apk, which didn't exist before. In a cold start and using the network (AGPS), I got a satellite fix in less than 25 seconds inside my home (near a window obviously).
- The operational system is much more stable.
- I think (didn't test it) that WiFi connection is better.
- Windows Live apk is installed.
- Compass problem wasn't solved
It is a very good update, my RAZR is much more stable and I recommend to everyone who have a Vivo RAZR.
I won't explain how to use RSD Lite since you can brick your device. First, try what casaroli said and try to update by Software Upgrade by Motorola. It is the safest way always.