Ryzen is possibly the most prominent form of competition for the Coffee Lake family of chipsets. However, the Intel CPUs have dominated the market since the release of both lines. Now, however, Ryzen appears to have opened a lead on them (if a very slim one) in these terms.
https://www.notebookcheck.net/Ryzen-beat-Coffee-Lake-for-CPU-market-share-in-July.320448.0.html