Servethehome has an interesting preliminary test that pits a dual-socket 18 core Xeon 6150 Gold against a dual-socket 32 core Epyc 7601.
A bunch of the noise about Xeon vs. Epyc has been a comparison of the highest-end chips, but frankly I think in most real-world server workloads the Epyc is really competing against the Xeon Gold series and not the platinum series.
The interesting takeaway is that in the compiler benchmarks the Xeon Gold 6150 basically ties the Epyc 7601 even though the 7601 system has 77% more cores. More interestingly is that far from being massively expensive, the Xeon Gold 6150 -- at least at list price, which we all know is not the real price most people pay -- is noticeably less expensive than the 7601.
The compiler test results in particular are markedly different than the rather rushed results that Anandtech posted last month. I know that Anand did some quick testing of Xeon and Epyc that got some play (and was advertised by AMD) but frankly I'm not impressed with their methods for several reasons including that they apparently didn't setup their Xeon box correctly and were using a non-production Epyc system that was customized by AMD just for their review. I generally trust STH more than Anandtech in this area since Anandtech is really more a consumer-focused site.