Do you think the JETBeam RRT01 is just as good functionally as the TCR1? Based on other threads on CPF, the only difference between the two is the finish. General consensus is the infinitely variable output is the way to go, plus the clip is better than the M11R.
Whether to go with infinitely variable or not is a choice I leave up to the light. The excellent post by RLichter, which I've quoted below describes one reason not to go for infinitely variable lights, but that said, I love my TC-R1 and have no problems recharging its 18350's which I feed it, since it has the capacity to take them.
I think you understand the difference between materials and finishes, but would like to specify that while there is a finish difference between the two lights you mention, with one being bare and the other anodized, they are actually made of different materials, being of course titanium and aluminum.
It's a big difference and some of them are heat-sinking capacity, durability, lasting beauty or willingness to scar and weight. You have to choose which are important to you, but the Ti light will always be more expensive than its aluminum counterpart from the same lineup.
Infinitely-variable output seems a highly desirable feature, but in practice fixed-levels may prove just as useful. And the latter has a distinct advantage at low-intensity levels where the percentage of energy consumed by the infinitely-variable brightness control circuitry can be significantly higher than that consumed by a fixed-levels circuit. To wit: the Sunwayman M11r Sirius in firefly mode (specified at 0.5 lumen for 30 days) lasts longer than the V10r Ti+ at the lowest setting (specified at 1 lumen for 35 hours). This disparity decreases as brightness increases so that at 100 lumen, there is not a significant difference in run times (confirmed by Sunwayman-USA).
This is such a great post and I believe that it gives us an idea of where today's infinitely variable lights will be shortly in the future.
HDS lights have 21-22 levels that are all regulated, and yet are close enough together that they essentially give the benefits of both set-level and infinitely variable lights in one. That's what I believe most of the dial controlled lights will offer before too long, which will negate one of the negatives, although adding cost at the same time.
I do travel internationally, and sometimes I get shower on with little warning, therefore, the feature of water resistance can be important to me.
Virtually all of the lights that you would even be considering are okay for taking a shower in and I've never had leakage when swimming with them in my pockets in hot water even. While it's still sensible to take some care, no need to worry about your lights having water permeation just by being in the rain.
