Injectors are the same I believe
You get more bhp out of a 130; upto 50bhp in some cases whereas the 150 tends to make about 30-40bhp
Also the 130 tends to make more torque; most of the 150's seem to struggle to make over 300lbs ft torque

Certainly the 170 engine in my Audi doesn't produce as much torque as my old 130 and the driving experience is very different.