Yes, with regards to performance, Nvidia GeForce RTX 2080 SUPER outperforms, Radeon RX Vega 56 by 71.6%.
The RTX 2080 SUPER is more energy-efficient considering its peformance, consuming 250 watts to produce 3DMark score of 11631. By comparing its benchmark score to its power consumption, we get an efficiency score of 46.5. RX Vega 56's efficiency score is 32.3, 44.2% lower, making RTX 2080 SUPER the smarter choice in terms of power consumption.
When considering value for money, RTX 2080 SUPER offers a better deal than, Radeon RX Vega 56 by 120.0%. Here is more in depth overview of the price and used prices of RTX 2080 SUPER Price History and RX Vega 56 Price History