The only real difference between the oe and the ne inside the saw is the exhaust height. They raised the port 3°. Everything I have learned about this model tells me that was a mistake. It might show more power on the dyno, but in reality I think it just raised the power band too high for any real gain in the cut.
Cobby found good gains by adding some intake timing, and widening some ports. I think he advanced the timing too.
I'm not knocking the new design.....the improvements they made to the air box seal are very nice, and very well thought out.