The Remingtons didn't have any scenes on the cylinder, but the Colts did. Both the 36 and 44 Colts had pictures of some ships in battle. They're usually real faint and hard to make out.
According to the Remington book, a New Model Army (44) weighs 2 lbs 14 oz, and a New Model Navy (36) weighs 2 lbs 10 oz. The barrel is shorter on the 36.
The frames do seem to be the same size, except for that little area around the rammer (I think, but not sure).
The army bought a lot more 36 cal. revolvers than the navy did, but then the army bought a whole lot more revolvers anyway.
I don't know why I am so interested in the Remingtons, maybe just because the Colts are more popular and I like being different!