well if we're talking characteristically it just isn't in spidey's heart to ever even kill deadpool first and foremost, and ya gotta expect a fight to the death going up against that stone cold killer, dig.
plus it's really not above wade to bring c4 strapped to his boots and just let spidey web him like "fukk it, ima al queda dude and hope for the best i guess, lalala." how many times has he shown up to a battle equipped with just pistols and katana's? almost none.
he's just about that life. attitude, cunning, equipment, healing factor and so on make a big difference. spiderman's gonna try to rationalize sh!t with him when deadpool drops from a ceiling fan in his crib like "what's the deal, man?" and THEN: shurikens, sai's and caltrops flipped from his boot to spidey's face as he shakes his hand. i'm just sayin' g.
spiderman's probably one of the softest superheroes ever.
plus deadpool has sidekicks, and you know they're down for the team.