That's true, regardless of manufacturer.
The 2015 Bs have some beefier transmission parts compared to my 2013, for example. A non-mechanical example, the 2015s+ have cruise control, mine doesn't.
My 2006 Apex sled was on the trail R & D for Yamaha. The cut out all but two grease zerks and used "permanently sealed" bushings in the suspension to try to shave a few ounces of weight. I was replacing those bushings every fall until I gave up and traded it in. They also used me and others to experiment with titanium Y pipes...which tended to crack and break every couple of years. Titanium ain't cheap.
I do have a question about Harley...how in the world are they able to meet EPA regs with air-cooled engines?!?!