First of all Bodhi is so Newfy in every aspect. His ears and mouth are perfect and you should be glad he isn't extra jowly cuz your walls would never forgive you.
His age is does have a bit to due with the look though. I affectionately call it the "uglies" and most dogs go through it but will come out benefitting on the other side. The difference could also be due to color. Different colors bring very different personalities generally speaking ans the body features may apply here as well.
You can go to this topic and see Bear in his ugly stage. http://www.bigpawsonly.com/index.php/topic,3927.0.html
As for Bear & Fumble, they look so similar because our breeders are friends and they have one overlapping male ancestor which is why Eiren and I call them the twins.