18-
I'd disagree that you are answering the question at hand at all. I think you're just confusing the issue by bringing in this scenario.
As has been pointed out, the heavier airplane will go farther than a light one, if both are operated at the L/Dmax AoA. This is what you are alluding to, I presume? However, in actual fact, the difference in the glide distance due to the change in Reynolds number (and associated drag reduction) is likely going to be so small that it would be nearly impossible to measure, let alone for you to see in an operational environment. I stick to the reasons I gave previously for your observations!