[dodge]

I would go with the 2013 they redesigned the 15 series in 2011 I believe. The 2006 maybe sapele or mahogany as they built them with both at that time. The 2013 will definitely be made from solid South American mahogany and have a open back tuners. A diamond inlay pattern on the fretboard, a proper rosette around the sound hole, bone nut/saddle and ebony bridge pins. I think the 15 series guitars sound great from the start and wouldn't be concerned buying a newer one over an older one. I have a 2011 D-15M its a wonderful guitar.