Well, comparing two similar output lights won't ever make your jaw drop. No matter how much you spend.
As for output, the LX2 has a larger 'spot' than other TIR Surefire's like the E2DL, which I find is better as you have a larger area lit up.
The TIR is designed to throw the majority of the light forward hence why the drop in, using a reflector has a greater amount of spill.
Also, because the hotspot of the drop focuses it's light into a smaller area, it will definitely be 'brighter' than the LX2.
The same thing can be said about any light using a TIR, my Malkoffs have the same outcome compared to my Fenix TK11 etc etc