If we can compare beam reach and foreground width, certainly we can compare relative intensity and relative distribution.
Yes, we can compare
relative intensity at particular locations; we can say lamp A provides more (or less) light than lamp B at location X. We can't say either lamp provides
too much light at location X, though. Not without more data that we don't have here.
Over-illuminated is indeed a comparative judgement call based on the data presented.
No, it's not. There is nothing in the images you've posted that can support your guess that the foreground is over-illuminated. You're trying to make sangria with nothing but two grapes and an ice cube -- that's not enough ingredients to wind up with what you want.
I'm making a narrow judgement that compared to the bi-xenon, the bi-LED has an over-illuminated foreground
Say it five times, say it seventy-five times, say it three hundred and five times...it's still a guess that is not supportable by the images you've posted. It just isn't.
Now this is the kind of thing we
can realistically get out of the images you've posted!
and unfavorable beam profile on low.
What do you see that you consider unfavorable?
Since you mentioned the 2nd generation bi-LED, I'm you're aware that Hella corrected that excessive foreground illumination.
The newer headlamp has a different light distribution than the older one, and yes, the newer one gives less foreground light. But "reduced foreground illumination" is not the same as "corrected excessive foreground illumination". The first is an objective statement of fact; the second is an opinion.
Night vision is hardly complex
Oh, wow...if you think that's right, you are profoundly unequipped to be discussing headlight performance at any scale. Or, alternatively, you know everything there is to know and have nothing to gain by asking questions.
Mesopic vision -- that's the night-driving mode -- is in fact the most complex of the three main visual modes.
Indeed we do. That doesn't make it "not at all complex". You seem to have an affinity for non-sequiturs.
it's covered in any introductory physiology course: intensity and area.
Oh, dear me! OK,
this link should be your next stop. And then some better texts on human vision, especially in context of driving -- books like
this and
this and
this. Then, if you want to make a detailed analysis of the various modules you might decide to use, purchase one of each and send them for photometric testing.
Then you'll have data usable for reality-based judgments of the lamps' real performance.
Or, alternatively, you could just realize that you're agonizing, probably unnecessarily unless it's the kind of thing that turns you on, over which of the highest-performing 90mm headlamps to buy. If you don't like the light distribution of one versus the other...buy the other, then the problem -- no matter how real or imaginary it might be -- is solved.