XL vs L

Hello,

I've been brushless for 2 seasons (well really 1 1/2) and in that time I've use 9L and 10L motors. I know they make XL versions of these motors too. What does and XL do that a L doesn't? My Maxx with the 9L or 10L is about as fast and powerful as the tracks I race on can handle. Will an XL do the same job only more efficiently? Cooler? Heat is a big issue, my motors are super hot at the end of 5 mins. If an XL can get my temps down, that would justify a switch.

I tend to subscribe to the bigger is better theory but I wonder if some of you Brushless Veterans know the difference between the XL series and the L series...

Thanks for your time.

MacII