I dunno. Slott would've never done something like Hunted, at least the way it was handled, in particular because he didn't even want to touch Kraven.
I don't think Slott would've done what Spencer did with Felicia and have her learn Peter's identity again.
Kindred doesn't feel like a Slott thing.
The Boomerang stuff is just building on Spencer's own Superior Foes, same with Beetle.
The stuff with Jonah feels more like building from what Zdarsky did and hearkening to various eras of Spider-Man.
I would say on a general basis, even setting aside the couple thing, Spencer has a better handle on Peter and MJ's voices than Slott generally did.