I have three 498T pickups, one from 1997 (original from my 97 LP Standard), One from 2015 and one from 2018. I was measuring their resistance recently and interestingly, the 97 and 18 both were the same at about 13.4 Ohms (the expected value for these), but the 2015 one was lower at 12.8 or so. All seem to work. The 97 sounds hotter to me than the others for some reason. Question is, is a 498T reading at 12.8 within the normal tolerances or does it indicate some possible problem internally? It seems to work and sound OK. Also, Can "identical" pickups, say the 498T as in this case, sound and behave differently from one another due to manufacturing differences, etc (you can get a "good" one or a "bad one") or should they all sound the same if working properly? Since my older one sounds a bit louder (and better) in my opinion, were older ones made better back in the 90's or luck of the draw? Thanks in advance for any input.