I've had both. Went from the stock chrome on my '14 to the black of a '15 or '16. The tone is deeper. The volume is not much louder. I think the look of them on my yellow/black is awesome.
For as little cost and effort as it takes to replace them (oem > oem) I'd say it's worth changing. At worst, if you don't like it then you swap 'em back and it's only cost you a few hours and a few dollars.
Ride safe, amigo!