The race ones will transfer much more noise from the rearend to the chassis. I bought the BMR LCA's with the poly on one end and the heim joint on the other. They're a little noisey but a good compromise.
hmmm, my rod ends seem to be doing fine with all that daily driving on the street. I post from experience and they dont make much noise at all (cant hear anything anyways over the whine of the gears or the note of the exhaust) after shooting the ends with WD40.
Talk to the people who make these products. They do not recomend them for daily drivers. They do transfer noise and a ruffer ride. They also wear faster on a daily driver. This info is from the manufactures.