In the following days there will be several test, of course there will be a comparison between the two version. Until now I'm very pleased by the performance of the Gyro. I still need to update the firmware as i see that it's being improved again.
It works even better when it's used in the car, as a dash cam.
SJ4000+ (with and without Gyro) latest update - 2.3.1
Official changelog
1) Adds the rotation function
2) improves the performance of gyro anti-shake function
Firmware is available on sjcamhd.com site.
Complete (history) changelog and tested firmware archive can be found on my Blog
How to update