I'm a fan of both characters, but I'm more vested in Nightwing. Having said that, I am enjoying the heck out of Red Hood and the Outlaws. The writing has been great, the art is amazing and the characters are interacting so well together. It's like a 9/10 for me. Nightwing is good too, but I would rank it lower right now, probably 6/10.
So which book do you currently like better?