I just ran the built in benchmark in Pixinsight. I'm guessing no one else has heard of it, but it is astronomical processing software. Another one of my hobbies. The built in benchmark reports 3 scores, a "total" is which some blend of the other two, which are CPU and Swap. CPU is meant to be just that, isolating the CPU from other effects. Swap is a measure of disk speed, since the data sets are so large it is unrealistic for it to be held in ram. In my uses, a typical individual image data size is over 200MB, and there can be hundreds of these.
Anyway, since this is the Ryzen thread, I have 3 scores to present, CPU only.
6700k HT off: 6453
6700k HT on: 7978
1700 SMT on: 9461
6700k is fixed at 4.2 GHz, 2666 ram. 1700 is stock (all core turbo 3.2) with 2666 ram.
So, the 1700 is "faster" than the 6700k, but not by a huge amount.
Experience with this software on Intel quads is it easily saturates the CPU. I'm about to give a test run on the 1700 and see how that goes.