Hmph, have to admit I didn't even know you could do the body version
I'd be curious if there was any reason to do one vs. the other too... Eric's comment about when it gets rendered makes me think you might use the body version if timing might be important, i.e., you need the entire head to be processed before the script executes... I can't off the top of my head envision the situation where that would come up, but I don't doubt it exists.
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