I can speak only for the 7100. It's a reliable and intuitive workhorse camera. With quality lenses you should be able to get very good images from it. I use one for work and have thousands of shutter docks and enjoy the ease of use.
Hello. What is the budget (how much can you spend? Are you open to buying a used or Nikon refurbished body?
D7100 has the built in focus motor and external dials to quickly adjust settings. Just two nice advantages.