I have actually considered each of these systems in the past and just never pulled the trigger. I like the idea of having the pressure in my duals equalized but not too sure about it's use with a TPMS.
My thought has been that... with either dually system I assume I would mount a single TPMS sensor per pair of rear tires. As I understand it, the systems are designed to isolate a leaking tire so a leak in one won't drain the air from the good tire too. If that's the case, I'm afraid one of the duals could begin to leak, be isolated by the Crossfire/Catseye and the TPMS wouldn't know it was leaking until the dreaded loud noises began.
Maybe somebody has more direct information on this scenario and can chime in.