The LPF is a little bit lighter and is more prone to heating up, running higher turn motors means more heat, enough heat means melting the solder inside the speed controller which also means a dead speedo.

Its like using thinner guage wire, you save weight but you generate more heat so you use the smallest you can safely get away with to save the weight without melting things down. Some people use the LPF to save weight (and some money) because they know there not going to run that low a turn of motor.

Honestly I wouldn't use a speedo like the GT2.0 or a Tekin RS to run a mod motor with anyway. I find older speed controllers will acctualy turn a mod motor faster than the newer speedo's with the boost capability, there also cheaper to get your hands on.

The best Mod Speed controller i ever had was one of the original Speed Passion Fiego Brushless/Brushed speedos. I sold it to a local for $30 because he wanted to go from a brushed setup to brushless as cheaply as possible and I wasn't running mod anymore