I have a Godin SDxt, a 25 1/2 inch scale guitar, with maple neck, maple fretboard, maple center block body, with some poplar in the body wings to keep the weight below 50 pounds. It has lots of maple, and it's bright, which is OK because I have other guitars if I want unbrightness, and there is always the tone control knob. I only use the neck pickup on my guitars. The original pickup was not swift, so I replaced it with a SD Alnico 2. Why 'that pickup,' I'm not sure, I think because it was in stock locally and the price was not outrageous. Now that my guitar inventory has evolved a bit, I am still without a PAF in a guitar, and I have long wondered about having one, the original type. For all I know, a SD Alnico 2 may be identical in construction and performance to an Alnico 2 PAF. Research tells me that PAFs have been made, and are made, with Alnico 2, 3, 4, and 5. My question is: is there a reasonable chance that a Gibson of Fralin or Lollar or Mojotone or other PAF, with 'vintage' specs, will sound noticeably different than the SD A2 Pro I have in there; or is the exercize probably a wash and a waste of resources? Thanks for any feedback.