More expensive, but the company claims their design reduces vibrations more than other aftermarket models. I chose rubber over poly because I don't want all the vibrations for this daily-driver, and they will last longer than the poly ones. Immediately after installation, there was a great deal of vibrations over stock, but after a few months/2000 miles, the vibrations seemed to lower quite a bit. I don't think about it anymore. One more thing, Vibratechnics does not include a front mount, because they don't think the RSX needs one. Everyone else thinks otherwise. Go figure.