THE TWO TURBO's A VERY DIFFERENT!

One is more suited for a YB setup and the other anything smaller.
The T34 blades are very different to T35 Blades i.e the air flow charateristics.

I use the T35 on a FWD car upto 300bhp over that a T34 would be better.

T34 has more lag than a T35 down to the shape of the Compressor blades and design housing.