Overclocked the 8700K likely beats a Ryzen R7 overclocked. But Intel would really have to have messed things up if they are behind for something coming nearly 3 quarters after Ryzen.
The problem Intel then have is what will Zen 2 do in 2018 H2. Supposedly 10-15% performance gain again (clocks+IPC). Might even overclock well on 7nm.
With Zen 2, if AMD can release an 8 core 16 thread cpu that boosts to 4.5ghz on all cores and has an ipc increase to take it up to kaby/coffeelake ipc for~£400 standards then i'm in.
Hopefully by then they may have sorted out their pro audio/daw shortcomings as well ( if they haven't already)