Hmm... what defines a BT or hybrid?
From what I understood, if it's reusing the stock turbo, that's a hybrid.
Is the S280 "big" turbo? It's not BIG, it's pretty tiny. But it's not the stock turbo. So idk what defines it.
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As for tuning the S280, I would assume Adam is one of the best since he seems to have a lot of experience tuning it specifically. Since we're all out in the open, I have my personal reasons why I didn't go with Adam though, including the reason you mentioned. That's not to question his knowledge though.
I'm personally going with Stratified. I've always gone with him throughout all my flash tunes, so just makes sense to stick with what isn't broken. For whatever reasons, he's been quiet the past couple years on this platform. Seems like he's doing a lot of Golf's and Subies now. I'm not sure how many S280's he's even tuned as I couldn't find anyone in the forums mentioning it. But I'll be here to report back after I get my S280 installed and tuned later this month. It'll be great to share our experiences between Tune, Dizzy, and Strat.
I believe the more honest knowledge and experiences we share in the community, the better...