If you can handle both first pick which one has the best trigger to you between the two examples.
They differences are really what color so which color do you like better?
As far as the finish on the aluminum if you truly use it as a carry piece they will both show wear.
They are for all practical purposes mechanically the same so if you can handle first I'd just get whatever speaks to you.

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Straight shootin'
SWCA#2439