i never knew that the turbo brand affected performance, but i have observed that of the six or seven 300 turbos some did seem to be more noticably coming on the boost and some werer more of a flat torque curve. now i know why.

as far as how it happens that some have one and some the other i have never seen a reason and would assume it was availabliliy at the tme of mfgr.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.