Well, dedoming the LED doesn’t affect the light emiting angle AFAIK. Yes, I used to believe this wrong theory as well, thinking that dedoming a LED would not help in reflectored type flashlights but only with aspherical lights, but I was wrong… dedoming a LED will increase the “surface brightness” of the LED, which would help in both aspherical and reflectored type flashlights. You should check out Dr. Jone’s further explanation here 
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I do not own neither T13 nor the UF X6, but how about this Skyray STL-V2 , which throws very good. Some members here measured reading of around 45kcd (424 meter throw according to ANSI standard).