Motors RS-550 difference

Hi There. I need some help to understand if there is any difference between a motor RS-550 and the RS-550S.

Cheers

I searched both Bane Bots site and RobotShop and couldn’t find a RS-550S. Do you have the product code for it?

RS-550 Motor 19300rpm 12V 62.49oz-in
Banebots RS-550 Motor 19300rpm 12V 70.55oz-in