At those frequencies, core for core I'm expecting GC to be more power-efficient. Package power of 78.5W running AIDA Stress FPU at 6x4 GHz is pretty good (my undervolted 8-core Tiger Lake at 3.4GHz needs 56W for Stress FPU and 49W for CB R20) :
And it confirms what I said, AIDA64 FPU runs at a higher power than Cinebench MT on Intel. 78W AIDA64 FPU could translate into 70W Cinebench MT which is really good.