Comparing the 45kW and 60kW turbos...

Although they look pretty small at a distance, it is not until you compare them side by side when you realise what a difference there actually is!

Compressor inlet:

Exhaust exit:

It is no real suprise that there is a significant power gain when swapping the 45kW one for a 60kW.

A guide for changing the turbo can be found here.