A quick search of the specs shows that the 6.8x51 SIG Fury had more kinetic energy than the 5.56x45 NATO...by far. (3653J vs 1755J).
That, in of itself, makes me interested to see it’s actual performance in field tests.
Recoil analysis of the 6.8mm NGSW
https://www.youtube.com/watch?v=Nm64SgA2M3s