Do you have both? I do. Same rpm on the same prop, I think it will be a long fight to that death. Oh, 160 is 38 oz with pitts muffler and perry pump and spinner adaptor.

OS- Pro Zinger 18x8@9000
Mezjlik 18x8@8500
Std Zinger 18x8@8500

Moki-as posted above.

Moki may be able to handle larger props better, but so far the OS is keeping up, and if the OS doesn't overheat on the 20" props, then Moki doesn't even have that advantage.