@Eyes Wide Shut: I think you're over-thinking the whole damn thing. Please take no offense - BKP Syndrom, indeed, been here, done that, have the T-shirt :mrgreen:, but you won't know until you ear it on your guitar.
From experience, Tim's advises are more often than not dead on, even when they're not what you expected - the guy is a seasoned (and talented) guitar player, he does try all it's pups himself with as most guitars as possible, and for sure keep records of his customers feedbacks. He really knows his job, and not only the "builder" part.
For the record, I would never have bought the BGF52 set if it wasn't for Tim's advises, I was kind of skeptical but decided to give it a try and I have no regret. I only once returned a BKP (RiffRaff bridge), and really the problem was neither with the pup - which was pretty good and exactly what I asked for and what Tim described -, but with, well, what I asked for, which wasn't what I really wanted for this guitar. FWIW, I since orderer a RiffRaff set for another guitar and I couldn't be happier with it.
To make a long story short: you seem to know what you want for the mahogany strat. Order it, try it, if it works for you then take a little time to think about what you expect from your alder axe, and go for what Tim says (if you don't like it, remember you can ask for a swap or refund). If the first set don't work for you (rather unlikely IMHO but some people have hard time with the clarity, definition and note separation that are the brand's trademark), then just send it back.
My 2 cents...