I think I like number 1 overall. Number 2 has his mom's ears - long and pointed. I do see a flat spot on his back. Could it just be the picture angle or do you see it all the time when you pose him? I like number 3's ears - look like dad's but maybe slightly longer. Its kind of hard to see front leg extension. It almost looks like number 2 has longer front legs but, again, it may just be the angle.
I'm pretty sure it will. Im guessing its because they have a junior coat and their ring color or rufus factor hasnt fully developed.
Im also assuming that because their belly color isnt as white as their pappas.
I always go by what the color looks like on their head. Even with my tans. Usually when they molt it turns to the color that is on their face.