Sparkle works with a .dmg file, so you'd probably continue using DropDMG. I can't speak much for Winsparkle; I remember looking at it and immediately concludin

Sparkle works with a .dmg file, so you'd probably continue using DropDMG. I can't speak much for Winsparkle; I remember looking at it and immediately concluding that it wouldn't work for us. (FWIW: I ended up slipping in a few hacks so we could pop open browser windows on specific versions and commits, and even remotely kill them if needed.)