Have you seen a eLED in the Q40? It will look exactly the same. The beam of the eLED is quite a bit different, but I'm not sure I'd say it is great.
The throw will be farther with the standard lamp and it will be brighter. The eLED has a fairly sharp point where it gets pretty good throw and then tapers off fairly quickly and somewhat splotchy. It is also fairly white.
I think both are OK, but for different reasons. The 2L is a pretty cool light all things considered. It is bombproof, very small and light, and the lamp is a good tradeoff of runtime vs brightness. The only real downside is the beam quality isn't as good as it could be. The eLED has great runtime, but isn't so bright and the beam isn't perfect.
-john