At the risk of sounding ambiguous, from my limited experience of about a dozen flashlights, I'd have to say that it depends on the overall design, engineering and "mission" of the flashlight.
The three different luxeon flashlights that I've have, the Inova XO3, SL Jr. Lux, and a Gerber LX 3.0, each of which use a lens, have very different beams. The Inova X03 with its Tiros lens is all spot, tight up close but spread out at the medium distances that it was designed to throw. The SL Jr. Lux with a broader spot and a touch of spill is, presumably, designed for task work - a good EDC type of beam. The Gerber LX3, a flashlight that I and others have spoken highly of in prior posts, has a fairly tight spot with a broader diamond shaped secondary spot and surprisingly bright and useful spill. While the spill from the 50 lumens of the LX3 does not have the width of, say, a MAG, it's brighter than the spill from my 150 lumen MAG118.
Reflectors too, again, from my limited experience, seem to vary just as much as lenses with their various parabolic shapes, sizes, width, depth, focal points, textures etc. as well as the position and type of emitter.
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