i think many people over think the differences between 490 and a 57/BB. 490 is about right at a BB3 but has 4 conductors. Good pickup. Slightly overwound PAF. The 498t is a ceramic magnet and more winds and 4 conductors. Like the Paf to 490 the 498t is an updated Dirty Fingers with 4 conductors and some really small differences. otherwise. 498t is the custom shop favorite. All I can say is a clean sound on a Blues Jr with my BB pros, is breaking up with JP Crunchlab. One must simply turn the gain down to rematch to the amount of break up you want. Like some one else said, overwound pickups are a thing of the past when a VOX and Marshall super lead wrre the highest gain amps around. Since the 80s when Mesa and others started adding gain channels to the preamp and Boss came out with the distortion pedal and overdrive pedal overwound pickups became the least practical way overdrice an amp. My advice is to not fall into the false web of pick ups. There is the Leo fender single coil. There is the Seth Lover PAF, Aka one of the BB family, or 57. All those have nuanced differences. The 490 is the Seth Lover with 4 conductors. Great pick up. Seymour Duncan and DiMArzio make good products but totally totally unnecessary hair splitting.