need new RTA bushings and unsure of whether to go OEM or Hardrace

ive read a few threads here and most people say only use oem/mugen/hardrace, and stay away from ES polyurethane stuff..

but no one has really mentioned the difference b/w oem and hardrace

from what ive gathered OEM is more durable and longer lasting, whereas hardrace is stiffer so not as durable

anything else?