The earth isnt a perfect sphere and travelling through space at about 3 million kilometres per hour. The earth orbits the sun in a cyclic ellipse every 40-100000 years. ( hence ice age/melt) The precise wizardry and phenomena occurring inside the magnetic fields of your motor are beyond comprehension.
The data can be significantly altered depending on the input voltage. Motolyser V2 is the innovator and most accurate. Hobbywing is just a revised copy of that. Just use one if you have to , get some data of each motor and pack away.