The improvements NVIDIA made to the cooling solution on its Founders Edition cards are plain as day here, and both Turing cards posted lower temperatures despite being more powerful. Both cards were also fairly quiet, and I don't see this being a problem for most people.
However, the GeForce RTX 2080 Ti is also the most power hungry of the lot. It also happens to have the highest TDP at 260W. I do like the efficiency improvements NVIDIA made to the GeForce RTX 2080 though. The card has a 225W TDP, lower than the GeForce GTX 1080 Ti's 250W, and it draws less power while still being slightly faster than the latter.