I'll use my Pelican 2350's as an example. The first gen was 100 lumens and stated 19k+ candella. The next generation was 175 lumens and stated 9k+ candella. Same light, same body, just different LED. I use the gen one to see off in the distance in say, a portion of my neighbors back yard three doors down and the gen two for say, lighting up my entire back yard.
That's pretty much the way I see the ML25 versus the Minimag AA. One was meant to spread light out more evenly while the other was intended to spread light a lot farther. A WHOLE lot farther. In SureFire terms you could say MaxVision vs their TIR system. Whichever one works best is up to the buyer.
The XL50 is somewhere in between the ML25 and Minimag AA in my view that leans more toward throw than total spread.
I hear what you are saying, but it isn't quite that way. It is all about LED size and reflector size.
To give some examples.
If you had an old CREE XP-E LED driven at the same amps. Put it in a Mini Mag and it'll give quite a throwy beam. Because the LED has a small surface area. This allows a small reflector to focus the light quite tightly. If you put this same LED in a D-cell Mag reflector, it'll be a really good thrower, but the beam will be really narrow with a small hot spot and quite dull spill beam. This is because the larger reflector can focus the light even more tightly.
The extra throw comes from a more concentrated, narrower beam. I actually have an XP-E drop in for a D-cell Mag, and it really is a superb thrower and can light up objects further away than many of my modern lights. But the total light output is very low by comparison.
Now the stage would be to retain the two reflectors (Mini Mag and D cell) and change the LED. If you swapped out the XP-E for a CREE XM-L chip, the XM-L is much bigger, with a much larger surface area. In the small reflector of the Mini Mag, you'd have much more of a flooder now. As the small reflector would struggle to focus the light. So you'd end up with a large hotspot that blends into a bright spill beam. But the lux/candela would be significantly lower than the XP-E.
In the bigger reflector you will see the same trend, the larger reflector will be better able to focus the beam than the small one, giving much more throw compared to the same LED with the small reflector (i.e. higher lux/candela). However, as the XM-L is much bigger than the XP-E, you still wouldn't get the same throw. You'd get a bigger hot spot and a much brighter spill beam.
So for throw (or high lux) you want a mix of a small LED with a large reflector. However more lumens for a given setup will always offer more total light.