RTX. I cannot believe people bought these things without actual games to utilise them. Surely nobody buys anything without proof it's of any use considering the astronomical price of the cards. Madness,pure madness and I've no sympathy for those who have got one, one on order or who are about to buy one.
To be honest I don't care about RTX or DLSS, what I do care about is the 2080 Ti is about 30% faster than a Pascal Titan but costs about the same.
There is also the bonus that unlike the Titan V you can run a pair of 2080 Ti cards in mGPU using NVLink.