Interesting that the road and track article argues the 2013-14 run wasn't retro enough, while this review insists that, for those years, it was too retro. It's kinda silly and I'm not sure why any of it matters, I mean, who cares which is or isn't more subjectively retro? In fact, I take back that I said it was interesting, it's not, it's silly, and now I'm firmly in the this is silly camp.
But silly can still be fun, so let's sum-up: spoked wheels? Retro ®. Thats one for 2017. More squared tank ®. That's one for 2014. We're one a piece. Hmmm, incandescent bulbs ®....and speckled, reflective paint ®...that's one each again. Let's see, green background speedo/tach ®... and purposefully rough engine (half-credit for 2017).
So, this list, complied from what I can easily come up with off the top of my head, gives retro advantage (RA) to the 2013-14 run. Hope that helps