I chose the stickers over the decals because durability and ease of application. Any waterslide decal can be scratched off by accidential rough handling, even with proper surface prep and overcoat. In addition, there's no need for gloss clear coating as with waterslide decals.
So the stickers are much easier to apply and more resistant to damage. I don't know of Anthrapoid's decals, and can't comment on them, but both he and Firebird are using professional printing services, so I would assume they are comparable in print quality. Regardless, I'm 100% satisfied with the stickers I've used.
My expert opinion of course
I'll leave Firebird to join this thread (he knows), I don't want to speak for him in terms of price etc.
BOBBY