Cylinder head questions

[Budz3769]

Hi everyone, hope your all staying safe and doing well.

I have 2 a4’s, both 1.8T, both FWD and my new one needs a the head doing. My old one is an AVJ 150 BHP and my new one is a BFB 163BHP. If I remove the head off the 150 engine get it sorted and put it on the 163 as I going to have any performance lost from this/will my engine suffer? Or is it mainly software and turbo etc that make the difference, any help would be great.

thanks 👍