Have you tried keeping track of this thread? 170 pages, mainly of gibberish. Last i heard from any supposedly credible leaks was it was around 8% over 1080ti.
The 2080 is rumoured to be 8% faster than 1080TI
the 2080TI nobody really knows to be frank everything else is just guess work or linear relationships assumed by some which we all know is not accurate to assume.