The higher the wool, the less the nylon, the slower the speed will be.
But, with respect to thread counts, think about your bed sheets. A higher thread count is generally a slightly thinker, more plush sheet. It would be slower.
Now, there may be other things to take into account, which I doubt Simonis would reveal. Is the weave one under and one over, or is it one under and two over? And with which cloth would that be?
More questions than answers, though the wool to nylon ratio is the most important.
All the best,
WW