Touch sensitivity is all about how the amp, speaker, effect, pickup sound/react based on your touch. So yes it is all about your ears. Please tell me you can tell the difference purely based on touch the difference between any two pickups. If I blindfolded you and gave you a guitar with Black Winters v. a guitar with 59s unplugged could you tell the difference based on touch? Hell no! You would need them plugged in to "feel" (dare I say hear) the amplified sound, the sustain, the sensitivity and the bloom of the note. No pick up will change the physical feel of an instrument, it can change the attack when touched, but not the physical characteristics of the instrument. Unless you are telling us somehow your fingers can detect magnetic fields.