There are two major differences between a great vintage Strat pickup and an average one: treble response and dynamics. A great pickup is clear and bright , but not thin sounding. And a great one makes the sound jump out of the amp when you pick hard and drop away when you play softly, and the tone varies when the string is picked at different spots. The best pickup that DiMarzio heard that was like that was from 1958 and that is what inspired the Area '58, with two major differences. DiMarzio's pickup has less magnet pull, and virtually no hum.
DC Resistance is 6.12 KOhms