W123 Manual Window Regulators
 

I am not sure how to figure out the best part numbers to use for my car, which currently has power windows that I am converting to manual. When I look in EPC, I find two potential part numbers for each regulator. Both appear to be available to order new, for the same price. How do I know which to order? Do they support a different crank style or have other differences?

Thanks for any advice!