That is a juxtaposition best left alone. Even hyperbole could not justify that. Spawn was a man who thought he was doing good deeds, when in fact his good intentions paved his road to hell. Once in hell, he bartered his soul away in exchange for leading the army of the devil (Melbolgia) against the armies of Heaven. Spawn was a man of serious sin (even if unwittingly) who did further damage willingly. Spider-Man is a wear mortal trying to stay on the right path (and who usually does) and is caught off guard. If Spider-Man were comparable to anyone, it would likely be Samson, who was once God's chosen warrior, but was led astray.
Just because these characters are super heroes, does not mean that we can forget that they are mortal and human. Humans make mistakes. Even fictional ones. Because nobody would believe in a fictional humanoid character that is perfect (which is perhaps why Superman is such an unpopular character...just look at the sales charts). Though Spawn has devoted his career to redeeming himself, the fact is, is that he used evil to escape his own evil. Where as Peter used evil to escape the evil of others. This is perhaps a sign of just how extreme certain fans are becoming. The end result of these new Spidey stories really isn't that bad.
Let's all review what happened with Ghost rider. because the funny thing is its VERY similar to Spidey's OMD. it also shows mephisto has his limits. every other line I will be referring to spidey. it wont seem similar at first but watch...
Johnny blaze got mixed up with some stunt show performers called the simpsons.

woot: heh)
Spidey was living in hiding with his family. mj and aunt may.
His Bud Crash Simpson eventually fell sick of cancer.
Aunt may was on her death bed because of a gun shot wound.
Blazed joined a cult and used a summon spell.
Spidey said he'd sell his sould.
Mephisto appears and says he'll restore crash if johnny gives up his soul.
Mephisto appears and says he'll restore aunt may in return for the spider marriage.
Mephisto heals crash. and crash later dies in a stunt. (mephisto screwed johnny over.) cant steal his soul because roxanne comes in and instead binds him to zarathos or something like that....he becomes the ghost rider as a result.
Mephisto heals aunt may. goes back in time retcons the spider marriage. resurrects harry. remasks spidey's identity, returns the webshooters and aunt may is well. plus im pretty sure he's created menace and jackpot in some way. it is plain obvious he's done SOMETHING to mj.
THAT is horrible story telling. just like peter. Mephisto was another victim of suddenly rewriting that character to fit a stories specifics. in this case it was an agenda.