someassemblyrequired

i know the most spendy and favorite kits are greddy and hks, but for those who wants something better or bigger like a 60-1 ,t04b.. i also see these are the most favored cores..
well my question is what about air research and Schwitzer ..

is there a difference between the Schwitzer t04b vs. garrett's and air research.. (still learning a bit more about turbo's)