No upgrade path, and part availability, should something fail. 1150 boards are no longer being made, so supply is going to dry up. AMD is making the switch, to DDR4, with Zen, in October, so DDR3's days are numbered, as well.
The specs are not the same either. One uses DDR3, and the other DDR4. The H170 board supports faster M.2 SSD, that H97 does not. It also has a better audio and network controller. The H97 anniversary was a very low end H97 board. The H170 pro4, is a more mid to high end board.