Laptop CPU, 13900hx Vs. 7945hx. which one for faster renders?

[Sasan]

I'm buying a laptop to use mostly Corona Renderer, right now i have a 5950x on my PC which mostly does what i need in terms of project scale and render times. so i wanted something with similar capabilities on a laptop.
I looked up and found that intel 13900hx and Ryzen 7945hx are the models that are within 2,000$ range. i know that 13900hx has only 8 performance cores, 16 efficiency cores , 32 Threats, meanwhile 7945hx has 16 P cores, 32 Threats.
i'm not very good at this but from my knowledge 7945hx is better, but i might be missing something. I would appreciate detailed answer on which would fit my needs?

PS, 13900hx is on a legion pro 7 and 7945hx is on an Asus rog g17

[James Vella]

Not to answer your question exactly but my main workstation atm is a Rog17 5900HX. I can do some time comparison renders if you are interested. At least then you have a close to 1:1 understanding of how your current CPU compared against the same CPU in a laptop (very close to I suppose). Then you can use that as a rough % differential.

[Aram Avetisyan]

The most important metric for Corona will be the Multithreaded, then the single thread calculation ratings. Cinebench is the industry standard (at least in regards to rendering) for measuring both, so you can check each CPUs score and see. They are quite similar, with Intel being a bit faster on single thread, and AMD being faster in (some) multithreaded calculations, according to this website (quite trusted):

https://www.cpu-monkey.com/en/compare_cpu-amd_ryzen_9_7945hx-vs-intel_core_i9_13900hx

Check the memory capabilities too, as that is another important factor for CPU and effectively Corona.