Geeetech

The 42SHD0217-24B have a torque of 450 mN.m and the 42SHD0034-20B have a torque of 260 mN.m, so yes they have much difference.
Other Prusa I3 printers they use no less than 450 mN.m motors.
If I knew that the motors that came with this printer were these maybe I had decided not to buy it.

I buy the I3 Pro B printer but for my surprise the motors received are 42SHD0034-20B instead the 42SHD0217-24B.
That motors have much less torque, you are cheating the customers.
They will end up losing steps in fastest print speeds.
What a disappointment...