AAAH! Comparing apples to oranges. :S
The Smart TPMS (
Clicky) that you are referring to is a cell phone enabled deluxe version of the standard RV TPMS - TireMinder Model TM-77 (
Clicky). Twenty-two tires, up to 232 psi., with repeater for standard long trailers (>30 ft.)
The Trailer TPMS (
Clicky) that you are referring to is the new SOLAR POWERED TPMS designed for smaller (pop-up/utility/mini) trailers less than 25 ft long, not more than 4 tires, and not more than 70 psi. per tire. (TPMS warranty is void if the tires exceed 71 psi).
Sorry, I assumed that you were comparing the Smart unit with the standard RV trailer unit TM-77. I use and recommend the TM-77.