Can a turbo expert assist me with some information. I've done the googles and have come up empty so hopefully someone here can help me. I am comparing two turbo chargers. The first being the Garret GTX3582R 1.01 A/R (T3) VS Garret GTW3884 w/ 0.96 A/R (T4). Supposedly the GTW is an upgrade over the GTX (i Cant seem to understand why except for the whole T3 vs T4 thing). I always thought the larger the A/R the better the flow... Any assistance would help. I did go to the garret website but i was absolutely lost with the numbers that meant nothing to me.