Oh wait, here's a good way to tell the Earth-1 from the Earth-616 model of toss-and-return supervillain: the Marvel one apparently has an interesting obsession with...um...well, let's just take a look:
Panel from Web of Spider-Man Annual #8 (1992), script by David Michelinie, pencils by Scott McDaniel, inks by Keith Williams, colors by Bob Sharen, letters by Steve Dutro
Whoa. Way too much information, Boomie. What you collect in your own time is your little secret, okay?
Well, I guess it coulda been worse. Glad there wasn't a MAX version of Boomerang where he and Blacklash fought Squirrel Girl, I guess.
(I am only six years old. Of course I find that funny!)