I use the Pressure Pro system also. In looking at the smartire system the sensors are mounter to the inside of the rim. Pressure pro are mounted on the valve steam, I changed mine to steel ones, but they claim you can use any steam. So the only time the sensor is using poser is when I hhem installed. The other system would be powered all the time and making sensor life a little shorter I would think. Also to change the sensor you would have to break the tire down to get inside. I guess the up side would be noone could walk off with it but that has not been a problem for us.
I had one false alarm but It is a peace of mind thing and makes the DW happy
George and Debi
2006 F250 PSD, 2005 PF30CK