Difference Between Mk2 1.6 Engine And Mk2 1.8?

Having just bought a Mk2 1.6 I am trying to find out as much as possible about the differences between the engine used in the mk2 1.6 and the engine from the mk2 1.8, so that I can decide on how I am going to proceed with my FI plan.

I already have a JR M45 supercharger with JR air/water intercooler that is currently fitted to my mk1 1.8. The intercooler should be a straight swap, as it was on a mk2 when I bought it a few years ago. I think the biggest problem to overcome will be sourcing a bracket to mount the charger to the engine. If the mk2 1.6 engine is basically the same as the mk2 1.8, then all I need is a bracket and maybe a belt adjuster.

Can anyone explain the differences between the mk2 1.6 and the mk2 1.8?