What is the difference between the two train motors 8866-1 and 88002-1? At the Lego store the other day they were talking about a "more powerful" train motor for the Maersk train (I was asking about adding a second motor to the red cargo train so it would go uphill). But I think it's the same motor that already comes with every other train out now. I bought an spare train motor (was on sale online) and I think THAT is the old version.  

What is the difference between the two (beside the power cable)? 


https://www.bricklink.com/v2/catalog/catalogitem.page?id=84711#T=S&amp;O=  


https://www.bricklink.com/v2/catalog/catalogitem.page?id=99046#T=S&amp;O=
Well the power cable is the main difference, as one motor was made for the short-lived 9V RC system while the other is the current PF one.

However, that doesn't mean the internals are the same. From Philo 's motor comparison page, you'll see that the PF motor is better, and that fortunately the performances are much improved [over the RC one], with an efficiency and power even exceeding the old 9V train motors.