Maxx Air Fan 4 speed vs 10 speed - any preferences

I’m building out a ford econoline van (not extended). About to make my roof fan purchase and curious if anyone has experience with the Maxx Air Fan 4 speed vs the 10 speed?

I found the 4 speed for cheaper but wondering if I’ll regret not spending more for the 10 speed. The space in the van is small so curious if 6 additional speeds will make much difference.