I'd say the yellow tagged one.
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yellow tagged
I don't see anything that would indicate he'd introduce any problems into your flock. He is simply truer to "type" than the other. Looks stockier, even the color is better though that really isn't the issue. You want a full chest and a stocky look. The first doesn't look very Orpy.
x3 His tail will fill out as he gets older especially if he is the only roo in his flock.