Rendering and threads with newer cpus.

I was wondering: is setting the render to 0 still the best option, or is manually inputting a thread number better for render times? Like I have a 2700x cpu with 8core/16t (and if going by toonbooms doc you wanna enter 2 threads per core) then should it be 16 threads or 32?

Not sure if setting the Threads to - 0 - (auto), or manually to - 16 - would make any difference ?
Using Activity Monitor, both are showing the same result, at least on my system (Mac).
Using - 0 - Harmony will detect automatically the available Threads.
Anyway = 8 Cores should have 16 Threads.