That's correct, GT/Sprint T5's had a 3.35 1st gear and carbon fibre rings and tapered rollers and use auto trans fluid. Std T5's still use gear oil with brass rings.
Interestingly the original U.S. Z-type has a 2.95 1st gear which also makes it stronger than our 3.35 variant.

When i ordered the parts for my T5Z, they only had the one option, original spec gear. 2.95 input, all pocket bearings, carbon fibre rings, twin brass rings for reverse/fifth.

The US T5's never used the input shaft that the Falcons got, US had slightly shorter ones. So the 2.95 T5Z input is a Falcon exclusive.

They are basically Cobra T5z's with the Falcon length input shaft.

It's actually a tapered pocket bearing on the input. The gears have the needle rollers underneath them.

Main way to tell is the Input will have 24 teeth. (24 teeth = T5Z exclusive, 2.95 input shaft)

I assume you mean the long input, 2.95 was a Falcon exclusive? I believe it's actually just the '94-'95 stang gearbox which has the 0.67" longer input than the '86-'93 type?
My mate has the Z-type 2.95 gearbox in his Capri that he bought new straight out of the Ford racing catalog #M-7003-Z...2.95 1st,short input.
Most likely the 2.95 1st was used in the AU which explains why you had no option of the 3.35 1st of the earlier cars which of course would have been obsolete 5mins after they were sold.

just throw few idea's into this,my new car i got yesterday run's a 6 cylinder t5 behind its 5L by using a T10 bellhousing redrilled to suit t5 from mal wood and converted to cable instead of hydraulic clutch..

phill