Thank you for posting that info sheet Haldor!
Now i know what those -33 -36 name parts mean, it's coupled to the RPM/Volt.
As for choosing between these motors. I think it's more or less looking at Motocalc to which motor gives the best eff.
With the power packs you plan to use.
One more thing to look at is the price of these units.
Only problem is, this isn't the same all around the world.
So there isn't realy a best buy, all of these motors are great