Original bushes lasts better for us all round except on the stab arm ball joint, thats where we use blue polly bushes.
The polly ones dont have a metal sleave in general and we find that sand gets in between the poly bush and the metal its pressed into and then eats them for breakfast. But hey, our vehicles do 85% off road in conditions that most will stay away from, have heard that they give a better ride on tar though....