me and my friend used to argue about maguire vs. garfield. the new spider man, imo, doesn't really feel like spider man at all. he uses a web shooter. wasn't spider man bitten by a radioactive spider? the spider powers should come naturally, not from stuff like that.
Two different universes.
There's the Spectacular Spider-Man universe, which Tobey Maguire's Spider-Man was mostly based in, in which I believe he normally produces his own webbing naturally, and then there's the Amazing Spider-Man universe, which is Andrew Garfield's Spider-Man. I believe in his, he more commonly has to produce his own webbing from a web-shooter.
Depending on the telling of the Spider-Man story, he either can produce webbing naturally, can't produce it naturally and uses web-shooters, or used to produce it naturally but then lost the ability (sometimes linked to the spider that bit him dying) and replaced it with web-shooters.
But I might be wrong in which way round those are. I think there's been precedence for all 3 ways in the hundreds of different comic-book tellings.