I prefer the grey-grey color balance of the first, though I'd put the darker image (the couple) on the bottom.
With the darker at the top, the image seems to float up and draw the eyes *away* from the title and the rest of the design. Perhaps you could test lightening the darker image somewhat, aiming at a overall value more-or-less equal to that of the other.
Anyway, that *my* 2¢
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