Re: Seymour Duncan vs. Dimarzio
Larry DiMarzio make pickups and protects his company product line. You either like them or not.
In my experience, I have found that DiMarzio pups are rather metallic and brittle sounding for the type of music that I like to play (e.g., Blues, R&B, old school R&R); however, those some pups do sound good in the crunchy, metal overtone style of distorted music that used to called metal.
Since I like pure tone better, I go with Seymour Duncan pups. BUT even there I have found some pups not to be of my liking (e.g., Duckbuckers), which did not 'quack' when used with a rosewood neck and ash body, while being liked when used with a maple neck and aspen body. (I could never figure out why)
I have also tried all the brands out from Kinmans, Suhr, Harmonic Design, Lace, Fender, Gibson, and Fralins, etc... and with the exception of the Suhr and Fralins; I've always come back to Seymour Duncans.
Just my honest humble opinion!