Welcome to CPF kwk1=) ! First off, what are you using the light for? And yes.. if your comparing flood and diameter of the XML's hotspot to the XPG-R5 S2,3 that comes with the newer M20S.. youd be on the money. BUT.. i just checked out goinggear. apparently the newest Klarus XT11 at 600 lumens is coming out.. just giving you a heads up! To stay on topic though, Id recommend either the M20S S3 (newer led engine in the S series olights) and you will get longer runtimes*... But im used to surefire runtimes, so i dont much mind the lesser runtime on the M20X , to have that X factor for my needs (no punn intended):thumbsup: