I've owned them all and they're all very different. The Aeon is small and powered by the tiny CR2 cell, while the Beagle and Boss 35 are considerably larger and both are powered by an 18350 (The BOSS 70 runs on 2x18350 or 1x18650). There are huge differences between the Aeon and the Boss 35: the Aeon is a small single emitter torch with reflector that produces 160 lumens, while the Boss 35 is a triple, with optics, and is about 10x brighter. The Aeon is slightly "throwy" being that it has a reflector, and the Boss is pretty floody, but does have decent throw due to its high output. The Beagle might have a little more throw than the other two, but it's not super throwy either. The Beagle is very cool, but some of my friends have been unhappy with the beam temp and tint. One guy here swapped the emitter for a Nichia 219C, but supposedly the Muyshondt lights are difficult to open up for modding... Enrique doesn't plan on anyone modding his lights, but it can be done. Another difference between Muyshondt and BOSS is that since BOSS torches produce much more power, they can't be run continuously at maximum power... the other two can.
All three are quality semi custom lights, and they're all pricey. If you want a high quality custom that has better throw, you might want to look at a Haiku
http://www.candlepowerforums.com/vb...mo-Available-Lights-Pricing-and-Ordering-Info. I have one with a Tana LE and it's freakin awesome! Another great semi custom torch with throw is the Cool Fall Spy series
http://www.candlepowerforums.com/vb...e-Signup-Sales-thread-is-now-lt-lt-OPEN-gt-gt. They're even more pricey though... I paid $1,400 for the base model
. It's damn nice and plenty powerful @ 3.3 amps.
AND there's still plenty more great quality lights to look at. Good luck!