They came out within a couple months of each other, more or less simultaneously. Titan is aluminum, has 2 output levels, comes with a lugged body and split ring. Titan Plus is nickel coated brass, has 3 levels with max being 300 lms, comes with a lugged body but also a quick disconnect for keys and a pocket clip. Both come with an Eneloop Pro or 'Surealoop' as I have affectionately named them. They are generally regarded as cool in tint although some have reported a creamy white and a few units have been a touch on the green side it sounds like.