Straight after Martin posted, I used the drop down menus, retrieved the data, I punched the 30 watt, the rpm and torque numbers into my phone calculator to convert to S.I. units. (RadianSec-1, Watt, Nm or mNm)
A 775 label quotes a torque figure in kg, which will be kgcm & an obvious 7000 mistake, everything added up and they made perfect sense to me.
So what I was able to do was conclude the torque & rpm figure for the black motor was from a low load point and the 775s were too pricy and fast to do the arithmetic.
If I was in the market for such things, Amazon wouldn't be worth the wasted time at any quantity.
