@bernards my kindred computer friend! Here are my specs:
The direct answer to your question is I don't know for certain. It seems to make sense that a fast comp = performance increase.
However...
I also want to temper my response and tell you that I've walked this same road before with the help of MW Support: there are other things you can do first that will likely improve MW performance.
What helped me most was adjusting the UI Update Interval (Preferences > General > General > bottom of the top page). I had mine cranked too tight ~100 milliseconds. I thought, surely this sexy machine could handle the demand, but I was wrong. As soon as I began to loosen the UI Update Interval, MW performance dramatically improved. I have it set to 250 milliseconds, and it's perfect.
This begs a whole host of obvious next questions, which I don't believe I'm ever going to get answers for. But on the other hand, it doesn't really matter. I can now trade easily on my beast of a machine.
My unsolicited two pennies? Pocket the cash until Apple comes out with M3.
Hope this helps!