Yes, with regards to performance, Nvidia GeForce RTX 4080 outperforms, Radeon RX 6950 XT by 28.3%.
The RTX 4080 is more energy-efficient considering its peformance, consuming 320 watts to produce 3DMark score of 28063. By comparing its benchmark score to its power consumption, we get an efficiency score of 87.7. RX 6950 XT's efficiency score is 65.3, 34.3% lower, making RTX 4080 the smarter choice in terms of power consumption.
When considering value for money, RTX 4080 offers a better deal than, Radeon RX 6950 XT by 18.2%. Here is more in depth overview of the price and used prices of RTX 4080 Price History and RX 6950 XT Price History