I am getting the KT4 for my M3. M3 is presently using MN10 (LOLA) and MN11 (HOLA). Surefire website says that KT4 is using MN15/16 (LOLA/HOLA) with the same output. Can't I use MN10/11 on the KT4? What is the major difference btw MN10/11 and MN15/16? Thks.