who will win
"Spider-man's strength is much higher than Hellboy's, and I bet he is more agile. 1"
I'm pretty sure Hellboy is stronger than Spider-Man. He's not slow either, although he's definitely not as fast as Spider-Man. He can also take a crapload of punishment. He charged a machine gun that was firing at him, taking a whole bunch of bullets in the process. Spider-Man would still probably win, but if Hellboy really didn't want to lose he could just cause Ragnarok and destroy the world. Unlikely though.