The encryption also slows down storage performance if I am not wrong. So there is a trade off. Virtualisation for running sandboxes and cloud management of other devices.
The power draw between the 14900k and 14700k is about 30w
The temps are again similar.
https://www.techpowerup.com/review/intel-core-i7-14700k/24.html
https://www.techpowerup.com/review/intel-core-i9-14900k/24.html
Regarding performance, gpu wise both 4080 super and 7900xtx should be similar. The 7950x3d with manually configured gaming x3d gaming cores would have a slight edge.
In premier pro? Intel/nvidia like shown in puget system's testing.