For x265 HEVC transcodes, would the hyper threaded in the 8 core i9-9900K add any meaningful transcoding speed advantage over the 8 core i7-9700K? By meaningful, I mean at least 10-15%+. If not now, would it be probable that updates to HB in the next few years might leverage the extra cores and threads more effectively?
The search tool brought up returns for diminishing returns for anything over 6 cores on x264, and lower quality the more threads you throw at a transcode. I figured many might be asking the same question about these new chips, so I am asking here for opinions.

Paul