Shafts

Can anyone speak to the differences between "Made for Titleist" shafts as opposed to the "real deal" shaft counterparts, in particular the D+ (Whiteboard) in the 913 and the 'Ahina (the "new" whiteboard) from Diamana? I currently play the stock D+ and like this shaft but I'm always looking for something different to try. At the moment I'm waiting on an Oban Devo 6 05 I found on ebay to arrive. Seeing as I enjoy swinging the stock whiteboard in my 913 and after reading on the net that the "real deal" whiteboard (the 'Ahina) is superior, I need someone to help justify the bank it's going to cost for the 'Ahina. Similarities and differences if anyone has tried both and can comment please.