Since no one else has mentioned the obvious. The real answer is the one you can contol, and effectively put on target. Always depending on what that target is. Both work well for BGs, other targets might change the choice. I don't like .45 for hogs or bears, in those circumstance I'd want something else. Usually, in that kind of country I've got a .44 mag.
And magnum is really just a label.
I'm not up on enough science to tell you the energy transmitted to the target etc., if that's what you're looking for.
I've shot a boatload more .45acp than I have .357 so I personally trust it more. But I'm not shooting thru barricades or windshields etc.

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Pete.