i know the difference between the Suspension Technique and ITR rear sway bar thickness is..but what im wondering is even though ST is only 19mm and ITR depending on usdm or jdm is either 22mm or 23mm is possable the ST is just as good or better then the ITR's? because of difference in material if there is any...or has anyone ever had the chance to test out both of them and feel a better response from either one

 

The difference between them will not be because of the material. Im pretty sure they are made out of similar if not the same type of steel.

The big difference comes in the way they attach to the car. The ST bar is meant to be used on cars that did not come with a sway bar from the factory making the mounting points different. I dont know which is more effective but that is the difference...