Does Reception Sensitivity have an impact on range? The 2 units have different values; I just can't interpret what they mean: P5 5GHz: 11a 6Mbps: -94dBm 11a 54Mbps: -75dBm 11ac HT20: -66dBm 11ac...

Trying to decide between these 2 similar products. The P5 touch screen is nice, but not necessary. If the C1900 has better range, I will get it instead.