D
don
Guest
Genuine hands down
I vote poly. I've got Polybush on both my Defender and Classic. The performance based on the butt-o-meter is definitely superior to rubber. Replacement, as mentioned, is easier and carrying a few spares for trail replacement (which hasn't been necessary in many years of hard wheeling) would be relatively easy.
Almost makes it sound like Poly are prone to sudden failures.
All I know is that Rubber has worked for me for 21 years, and this old curmudgeon ain't changing what works.