Glad to hear your lamps are working for you...but ;-)
I'm far from an expert on this but I think the reflector (the big thing that holds the light source) is of primary importance. I would go so far to say it is the most important component in headlamp design. I also believe reflectors are designed by engineers to work in concert with a specific bulb and not a generic replacement.
The bulb filament is a known distance from the base mount. I'm not sure what the tolerance is, but I've heard the number .010 of an inch thrown around for the H4 bulb, and that is in each of three (X, Y, Z) axises. Might be more, might be less. These close tolerances allow engineers to design a reflector with a geometry that focuses the light exactly where they want it.
The result is a parabaloic-shaped reflector that will take the light from the bulb and reflect it back to the highway giving us a nice high-beam cutoff point, a reasonably wide beam, and any other design considerations.
When the bulb is changed with a like bulb, the geometry stays the same. But, if you change to a bulb with different geometry then the original focus point of the light changes when it hits the reflector. The result can be a really bright light but a with a beam pattern that has zero high beam cutoff, too wide/narrow of a beam or any number of other issues.
Most people when comparing two speaker systems will choose the louder set, not because it is sonically superior, but because well, it is louder. Same with headlamps. Most people will select a really bright lamp without regard to how effective the actual beam is. Not saying that is the case with the lamps you linked, but it is possible and probably likely with many aftermarket LED replacement bulbs.
Here is a picture of a stock NC700x headlamp. You can see that the bulb is covered on the end since that part of the bulb is optically weird. Much of the light is actually reflected back into the parabolic headlight vessel and away from the highway ;-) The light then bounces off the reflector at very precise locations and if all goes well, the photons will ricochet out onto the highway in a nice pattern. The reflector is doing a lot of the heavy lifting in these systems, thanks in large part to the precise geometry between the bulb filament and the reflector.
Here is a (very bad) picture of an aftermarket LED driving light with 3 LEDs..Notice that each LED has their own reflector, designed by an engineer to maximize the beam pattern as was done in the halogen lamp system of the NC700:
Those are an expensive set of lamps and I'm not suggesting expensive is the only way to go or that the lamps you referenced are inferior for your application. I'm suggesting only that the vessel holding the bulbs is important..maybe even more important than the bulbs!
Personally, I find that getting a nice, clean cutoff using LED bulbs in a reflector designed for halogens is almost impossible. Same with the spread...seems very scattered to me, as many of the aftermarket LED bulbs I see will scatter the beam 50 feet high into the trees. The exception are LEDs that are in their own housings together with reflectors designed specifically for that application.
There is a chance I completely missed the boat while writing this book so take it all with a grain of salt ;-)