what you're all not really explaining is that the t34 has a larger exhaust housing than the t3 (std vs. std). that means that the 'back pressure' is reduced compared to a t3, so the volumetric efficiency of the engine is raised and it processes more air. therefore for a given boost pressure, an engine with a higher ve will consume more air.

imagine it like this:

if you blow through a small drinking straw with a certain pressure, you get less air mass flow than if you blow through a drain pipe with the same pressure.

the t3 exhaust housing makes the engine a drinking straw, the t34 is a drainpipe.