the IMU is the same between V2 and V3.
The GPS has changed.
In V2, the GPS didn’t support concurrent GPS systems. And the NMEA sentences started with GP
In v3, the GPS is much more advanced and it does support concurrent GPS systems, for a more accurate result. NMEA sentences started with GN
In the NMEA sentences, everything after GP or GN is the same
I hope that clears it up
Mark --OzzMaker.com --