Earlier today, the first benchmark of the upcoming Exynos 9820-driven Samsung Galaxy S10 surfaced on AnTuTu. The handset in question is internally referred to as "beyond2" and might hit the market as the Galaxy S10+ (SM-G975F). In this test, the Exynos chip was clocked at up to 2.7 GHz and the final score was 325,076.
https://www.notebookcheck.net/Exynos-9820-powered-Samsung-Galaxy-S10-benchmark-results-spotted-online.369451.0.html
I suspect that the Exynos this year is significantly more expensive than the competing Kirin to utilize, unless Samsung Electronics and S.LSI reached a deal for S.LSI to operate at very thin to negative profits...or we'd be seeing a significant price bump of the S10 series.