Based on these early scores, it looks like the GeForce GTX 1070 Ti may be closer in terms of performance to the GeForce GTX 1070 than the GeForce GTX 1080. The last couple of weeks, word on the street was the opposite.
We'll probably learn a lot more the coming days. There's also a persistent rumor that the GTX 1070 Ti will overclock very poorly, with some sources suggesting that NVIDIA locked the card's clockspeeds. It's not known if this is only for factory overclocks, or whether manual overclocking will be impossible too.
According to the latest rumors, NVIDIA plans to announce the GeForce GTX 1070 Ti on October 26. This will be a paperlaunch, for the actual retail availability you will have to wait an additional week.