No, in terms of performance, Nvidia GeForce RTX 2070 is slower than, Nvidia GeForce GTX 1080 Ti by -2.2%.
The RTX 2070 is more energy-efficient considering its peformance, consuming 175 watts to produce 3DMark score of 9129. By comparing its benchmark score to its power consumption, we get an efficiency score of 52.2. GTX 1080 Ti's efficiency score is 37.3, 39.7% lower, making RTX 2070 the smarter choice in terms of power consumption.
When considering value for money, RTX 2070 offers a better deal than, GeForce GTX 1080 Ti by 16.7%. Here is more in depth overview of the price and used prices of RTX 2070 Price History and GTX 1080 Ti Price History