I have a 2013 ST-L with the v-twin and a 2014 RT-S with the 1330. For a "touring" bike like the RT...the inline three is the way to go. More torque, you dont have to keep the revs up like you do on the v-twin. What i run in second or third gear on the v-twin, I can be in 4th or 5th on the 1330. I think the v twin is great for the slightly smaller, lighter ST's and the RS's.