Think I'd give the edge to CM, in the overall. In a punch'em up, they're equal, more or less. But CM can more readily withstand/resist other forms of attack, and has superior endurance, thanks to Atlas. (Now, Thor utilizing certain power-effects from Mjolner/active divine power can influence this, of course, but in general, under "normal" circumstances...)
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Perhaps Captain Marvel. He's a creation of mystic energy really - I wonder if his clothing should even get ripped in a fight. While Thor is a living immortal empowered with mystic energy, that ups his durability to great heights.
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"I'm not smart so much as I am not dumb." - Harlan Ellison
Thor has the same weird thing as Wonder Woman where he's incredibly impact and blast resistant, but it's not *that* hard to make him bleed comparatively speaking by strong people with weapons, which is why he prefers to use Mjolnir to block.
Captain Marvel, on the other hand, has a body that is a magic construct. In the JLA Syndicate Rules storyline he got hit by a tesseract bomb that temporarily turned him inside out, and when he snapped back in place he commented he wasn't sure if even the others there could withstand it like that. Even when he's badly beaten you'll rarely see him bleed. I tend to think of him as being slightly more durable than Superman.
Thor's overall defense may be equal or greater, but in terms of standing there and taking a variety of attacks, Captain Marvel is my bet.
I concur; very well put. Most of Thor's major feats in that regard are either Silver Age, or an indirect by-product of using some divine power. Like I said further up, in a punch'em up, they are on equal footing, but when taken across the board, CM has the edge, just as he does over WW, some aspects of Supes, and similar characters.
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