I do only have a 513 twice, but different specs. Rosewood vs mahogany neck, compensated 513 nut vs PRS standard nut, 513 neck profile vs Pat. Reg., PCB vs point-to-point soldered circuit. Flamed vs Quilted, Orange vs. Black Gold, gold vs chrome hardware...
The 513 RW is original (apart from some optical replacements of wooden tips for the switches and the vibrato arm), the 513 MT has been electrically modified as a present of Paul himself to me (additionally it received some optical updates, too).
Former forum member Dancing Frog has a lot of 513s and 305s.
My other guitars are individual, some very, because they are literally unique (luthier made custom builts), or they have been modified.
Unmodified are my Reverend Gristlemaster and the Parker Fly Deluxe.