Same no difference .I scan 55.5 and 58 west and no improvement .The tuner on the premium 3 are weaker compare to the premium 2.I don't no if I have one good car I keep the car for longtime .So if the tuner of premium 2 are so good supposed keep the tuner on the premium3.The premium 2 on the 55.5 west scan 23 channels compare to premium3 16 to 17 on the 58 the two do almost the same job .Butt the 3880h 27690 fc 7/8 at 58 west strong signal on the [Only registered and activated users can see links. ]. Don't scan the freq the vantages 1100 the vantage vt1 the azbox premium plus and the premium 2 and 3 I don't no the signal on the receivers most of times are no good on all the receivers before very good on the 58 west I have that problem the rest good