Edit - had the reply open for a bit.... came back and see Haakon also gave a photo side by side.
I've used some of all. All are roughly the same to apply but there are differences on the brands and finish.
Oracal has almost what I'd call an eggshell finish. Not glossy at all - it's very slick smooth soft in a way - looks wicked good. It is the least matte. Oracals is also the blackest.
Avery's is fairly matte. Not quite as black but still very nice and smooth. Not chalky.
3M's is the least black - sort of odd. Nice to apply, fairly matte.
Last two are Hexis films. Regular matte - the other blackest of the bunch, fairly matte but has some blotchiness in the finish that I dont much like. Ultra matte - not the blackest but definitley the mattest (if thats a word). Looks chalky like black primer.
Photo of all side by side - not the best comparison but I happen to have samples of these all handy... Personally I think the Oracal is the nicest looking.