The point of the requirements isn't to give equivalent CPU power between AMD and Intel (that's what CPU performance reviews, comparisons and roundups are for). The game publisher is just indicating the lowest product that will provide acceptable performance in this title.
Downgrading the 3000 series Ryzen (with good single-thread performance) to any previous generation AMD CPU (with lackluster IPC and higher latencies) would make the single- and few-threaded performance much worse than any Skylake-based Intel Core i7 (4+ cores and 8+ threads).
Ok then, Ryzen 2000s are below that, but I really don't believe that "the lowest product that will provide acceptable performance" for the recommended specs is only the Ryzen 3700x...
Ryzen 3300x is a 4c/8t, just like the i7 7700 and has the same single core performance as 3700x (sometimes even better).
I have a Ryzen 3600 and at stock it matches the i7 7700 single core performance and my 3600 OC-ed to 4.4Ghz on all cores matches the i7 7700k OC at 5Ghz in single core (and destroys it in multi core) and as a side note, it also matches the Intel i9 9900KS single core stock. Would be the same for a Ryzen 3300x stock vs stock and OC vs OC (but equal in multi core), for this game.
So I call that recommendation BS, it should have been:
i7 7700 and Ryzen 3300x.