Alesis tends to have the edge on price and the value you get in a single drum kit whereas Roland always give the best quality playing experience but for a bigger price tag. If Alesis and Roland were to have a fight then Alesis would use their superior speed and agility to get in some quick jabs. Roland on the other hand would use their weight of experience and attention to detail to smack Alesis straight in the face. Unless Alesis can pull out some kind of sneaky or underhand move then Roland is going to push them down into the dirt.