5amp 72v motor ..

Hey y’all I’m driving a 2002 el that I bought from my neighbor, fortunate to have a Mobil GEM technician replace the flooded wet with some gels and give it the once over and a test drive.

I’m upgrading the exterior with a diamond plate box for storage and a ladder rack to transport a paddle board or go to the hardware store…

I have question about the 5amp 72v motor
Are there two different versions of this motor and if so what’s the difference and why??