FW up to 1.19.8 could be calibrated with the Webpage inside the camera.
and they are easier to "enhance"
.
But FW above 2.3.0 have a Thermal Blending mode and can used for RAW Streaming (i never did, but some other with Linux).
Additional its possible to turn off all GUI stuff like scale and Spot cross, for a real thermal view (interesting for video recording over UVC).
And you can change the MSX Distance directly from the View-Mode-Menu.
i think both Versions are not bad