I don’t want to argue

Is this true? Doesn’t seem true.

I gave you a reasonable explaination as to why a slight difference in pan volume wasn’t a particularly meaningful criticism of the less voluminous pan, particularly when it has the other characteristic you want: more edges per volume of brownies.

This is maybe as plainly as I can say it, you’ll be able to fit your standard “pan of brownies” recipe in both pans, without folding space, or having to tune your recipe down by some awkward amount. If your recipe can’t fit in one, you probably shouldn’t go single in the other even if you physically can, and are in for multiple pans or cycles anyway.