Cylinder Head Differences: A Comparison Guide

Hello everyone!

I was wondering if anyone knows if there are any differences between the VP cylinder heads. Specifically, I'm interested in the differences between the older generation (AHU, 1Z, AFN) and the newer generation (ALH, AHF, AQM, ASV, AGP, AGR).
I mean differences like different nozzle angles or different valves, etc.
I would like to know if it is possible to combine an old engine block with a new cylinder head.

greetings
Wolfgang.