I’m a perpetual novice at guitar but my day job is engineer and I specialized way back in my college days circa 1990 in signal processing and electromagnets. At the time I was convinced that digital signal processing effects could be used for my guitar to recreate any sound and I wanted to try to invent some stuff but I got a job working in radars instead. Sigh. Anyway I mention this because it explains why I have a passing interest in guitar electronics and pickup physics. DC resistance is being used as an analog for line length (there is a figure for ohms/cm or some such thing) on the presumption that longer line = more turns = more ohms and so it’s a figure if merit to substitute for number of turns which in theory means more current is induced and hence more output. But it’s a very gross analog anf fails to take into account the magnetic field strength and shape. If half of the coils are outside the field, they don’t count, for example. So the placement and strength of magnets matter too. All I’m saying is DC resistance yields what we engineers refer to as a WAG, or wild assed guess.