Just depends whether you want lateral flood or longitudinal throw really.
The TM11 with smaller and relatively shallower reflectors will flood laterally, and throw a little shorter at 286 meters as tested by Selfbuilt.
The RRT-3 Triple XM-L from the same parent company Sysmax has bigger and relatively deeper reflectors, with the three emitters more closely packed together for more throw at 346 meters, but less lateral flood.
Look at goinggear videos below to see the difference in lateral flooding:
1) TM11:
http://www.youtube.com/watch?v=K21RyStbwGQ
2) RRT-3 Triple XM-L:
http://www.youtube.com/watch?v=oSwjh0NG-Mg
Note how the RRT-3's deeper reflectors give a narrower spill, but then that light is redirected into the "corona" - a secondary band of light surrounding the hotspot, such that the RRT-3 has a very bright corona surrounding the hotspot.
For flooding purposes, we normally hold the flashlight by the lazy relaxing handshake grip, at the height of our thighs, well below the belt line; here the TM11 has the side switch.
For throwing, we hold the flashlight with four fingers over the top via the overhand grip, high above the shoulders, even high above the eye line to maximise throw; here, the RRT-3 has a tail end switch for the overhand grip.
Also:
The RRT-3 Triple is an older design, so it uses a magnetic ring, with very long 210 degrees of travel, such that it is not easy to operate one-handed; we must use both hands.
There is also an annoying strobe positioned on the far right, after Turbo mode; I wish they would relocate the strobe to the far left, then standby, then low to high etc.
The RRT-3 is significantly larger and heavier, so it can take more heat build-up before thermal protection kicks in.
With 4x18650, the TM11 does have 25% longer run time at 1 hour 15 minutes.
Both good lights. Up to you which way you go, or buy both!
I have the TM11 as a flooder.
And I actually have the original RRT-3 SST-50 as the thrower.
The old Olight M31 with an SST-50 emitter was tested to produce 760 lumens OTF, and a 63mm bezel diameter was also tested by Selfbuilt to throw 385 meters; I would suspect the old RRT-3 SST-50 with 1200 emitter lumens [~850 lumens OTF] and the same 63mm bezel diameter, to throw about the same or a little more than the M31.
Most of the current crop of single XM-L throwers today throw between 400 to 470 meters like the Crelant 7G5.
The Xtar S1 3x18650 powered Triple XM-L with a massive 83mm bezel throws a whopping 470 meters as tested by Selfbuilt, but the spill is very narrow as a consequence of the deep reflectors.
You could have both a flooder and a thrower.
Flooder for practical purposes - a TM11 is the best flooder so far.
Then your choice of single XM-L thrower etc to spot distant objects.
When we go for walks, I get my missus to carry the TM pure flooder, while I carry the old RRT-3 SST-50 pure thrower; I'll have to get myself a more modern thrower with 400-470 meters of throw - one day.
However, some people don't like to lug around two separate lights.
Then comes the RRT-3 Triple XM-L with 346 meters of throw, which offers something mid-way in between the two extremes, with just the one light to carry around.
I have Version 2 of the TM.
When it reaches 60 degrees Celsius, thermal pro kicks in to drop from Turbo to Hi, and when the TM is sufficiently cool, it reverts back to Turbo, and the cycle continues.
In the latest Version 3, once it drops to High, the electronics have been altered so that it will
hold and remain in High Mode a lot longer, before it is allowed to revert back to Turbo Mode.
Some flashlights have electronics where it won't revert back to Turbo at all, unless you manually switch that particular flashlight back to Turbo.
Version 2 is fine by me; I've had it since November 2011...