Right after I shot the tasting video, I jotted down a few notes on each.
A: (revealed as US-05) slight solvent note in the nose initially, after acclimating it comes across as a slightly spoiled/autolyzed yeast aroma, if not just yeasty. Esters lean towards pear and bubblegum (very slight). Both malt and hops aroma and flavor rather subdued. Balanced, but neither malt nor hops come across as distinct elements. A little harsh/astringent on the tongue, but it may just be the hop bitterness without the aroma that tells me that "bitter is OK".
B: (revealed as 1056) Malt/Toffee and citrusy hops in the nose. Low esters, pear-like but very subdued. Flavor mimics aroma, pleasantly sweet malt up front but well balanced by hop flavor immediately following. Overall, well balanced and clean with the word "fresh" being the best one-word summary. Would drink multiple in a session.
I'm frankly embarrassed by how much credit Tom gave me in the summary video. I want to be clear that I'm not BJCP certified so I have no basis for thinking my palette is in any way refined. I'm just a guy tasting some beers.
In any case, I really hope the whole thing inspired many more brewers to try the experiment for themselves. If they are inclined to report back, I'm sure we'd all appreciate the further insight even if it's anecdotal and horribly unscientific.