FDs can be either top pull or bottom pull, which relates to the direction they expect to receive the cable from. Traditionally, road bikes use bottom pull(cable rounding BB shell before hooking on to the FD) while MTB's use top pull,to get the cable away from dirt and crud.
Also used to be that the seat tube clamp always was above the cage - top swing I'd presume. But there's also a design where the clamp is lower - almost mid-cage. But this is mainly an aesthetic issue, and some compatibility issues if you want to run water bottles on the seat tube. Pull direction and shifter compatibility is more important.