My buddies newer R0 (2013-15) has one of the best necks I've ever felt on a guitar. I believe his has the V2 version neck. How would an older R0 neck, say a 2006, compare to that neck? And how would an older R0 neck compare to a newer R9 neck? Also, I notice some R0's have regular ink stamped serial numbers and some have a gold ink thats used. Any significance to that? Thinking about a cool older R0 and just trying to figure out if i'd like the neck. I'm currently playing a newer R9.