Not a huge difference.....probably more toward the bottom of the list for suspension.....although the front is defintely more effective than the rear.....prices are a direct reflection of name, material, and quality.....for you front id go with carbing or the trd.....neither is really the lightest but they are the most solid....the carbing has an extra brace with actually helps with braking (probably not noticeable).....Ken Henderson will be able to chime in on both, as he sports both ....for rear id go with the do-luck, but if u get do luck you will be like me and be waiting about a year to get it.....FEW MORE MONTHS FOR ME WOOOOOOOO