Well, the Gaang don't get as much screen time as they age. Also, the world has technology stuff, and motor vehicles.

I liked what I watched though. Korra, Mako, and Bolin (and the adorable Pabu) are all cool characters. Oh, and Amon was a blood-bending bad guy.

There are some similarities between the two. Amon is a combination of that old lady and Ty Lee from ATLA. The bending gladiators reminded me a little of Earth Rumble Six.