really hard to say until you have it in front of you and its tested. I mean take the Ryzen 5 2600x for example, on paper it has the same number of cores and threads and a higher clock speed than Intel's i7 8700 (at base) yet in the majority of benchmarks, the i7 performs better.
Mainly because Intel boosts higher, Ryzen boost is capped extremely low, if Ryzen boosted as well as Coffeelake, then i think you'd see a totally different picture.