I got another AT-1 and it does not say F-spaced on the box or on the invoice -guessing there are 2 versions?? I'm assuming I got a version meant for a LP.

My question is how off with the pole pieces be used with a Floyd equipped guitar? Or I will rephrase this in a blind A/B test could you tell the difference of guitar A) with a Floyd and non F spaced and guitar B) with an F spaced and by how much?