It really depends on the size of these tattoos, obviously being a first timer, a smaller one to start off with may be more recommended.
I like both your tattoo ideas, but i do have a soft spot for script ribcage tattoos.
If you chose to decide based on pain, then i say go for the smaller one, or the one on your hip, cause it will hurt less than on your ribcage.
But if you chose depending on which will make a better tattoo, i definitely say the ribcage ;)
