I have a neutral 5000K XM-L2 Hound Dog which I dig and recently bought a newer single 18650 Hound Dog running a neutral 4500K XP-L in there. Although I now own both of these models, I am afraid I haven't the equipment nor knowledge to run a full test comparison on them. To my naked eyes they both look similar in throw as well as output with the exception of tint difference. Tried searching but came up zip. Anyone knows where I can get more info, especially on the new 18650 Hound Dog and comparison to the previous generation Hound Dog?