I have both and wouldn't recommed either. The shell holder they use is a bad design.
The Frankford die holders walk making consistency impossible.
Priming on the co-ax and changing shell plates is a PIA. In order to fully seat primers I have to turn the jaw seperator all the way down - 30 hand twists (ask me how I know lol). Then to start the other process' it has to be twisted back up. Very tight work area, I wasted money on the curved jaws but they introduced slop. I put the In-line fabrication roller handle on which improved ergonomics some.
I struggle along with the co-ax only because I've invested in it but it takes the joy out of reloading for me.
I'm going to a MEC or Hornady once I decide to face the losses on the Frankford and Forster.