which is better, clifford matrix or viper vx791 ?

 

Same unit with same functions. Different transmitter cases.

 

Both are DEI units, so they are about the same, keep in mind, DEI does not make a remote start for standard transmission cars.
BTW that's Viper 791XV... http://www.directeddealers.com...5.pdf
and Clifford Matrix RSX3.5... http://www.directeddealers.com...5.pdf

both are DEI units... http://www.directed.com/ 94