N&C have always had different approaches to things. Since it has been awhile, I thought I would highlight a couple of differences they have been exhibiting lately.
Approach to food:

Notice that Nolan needed 4 bowls to house the various toppings for his oatmeal.

Whereas Caleb was willing to eat everything together...including his spoon.
Outdoor activities:

Nolan "making dinner."

Caleb climbing a tree...

and "helping" Daddy.