wokae. then how do we see which pickup has a stronger magnet?
Magnet Type
Alnico II - Good for Warming up a bright-sounding guitar
General Tone - Warm, smooth, round, enhanced mids, soft and spongy bass, soft attack
Neck & Body Woods - Maple, Ash, Walnut, Pao Ferro, Alder, Graphite Composites
Fingerboard Woods - Maple, Ebony, Carbon Graphite Composites
Alnico V - Adding punch to a warm guitar
General Tone - Bright and glassy, exceptional dynamics and tight bass end, sharp attack
Neck & Body Woods - Mahogany, Korina, Koa, Bass, Alder, Poplar, Ash
Fingerboard Woods - Rosewood, Walnut
Ceramic - Adding punch and output to a warm guitar
General Tone - Bright with enhanced upper mids, hard, aggressive harmonics, compressed dynamics and punchy bass
Neck & Body Woods - Mahogany, Korina, Koa, Bass, Alder, Poplar, Ash
Fingerboard Woods - Rosewood, Walnut
*courtesy of Seymour Duncan FAQ
I suppose pickups with ceramic magnets would generally be louder than pickups with alnico 2s & 5s. It's like comparing an SD Invader(ceramic) with an SD Alnico 2.