Shaddock wrote:How the FIA are going to try to compare like for like is interesting

Easily, they would need to hire a lot specially trained people to do the comparisons between all of the engine designs. And of course these hirees will not subtle for low salaries...
That's one possibility if engines are 'equalized'. Although, thinking about it, even if outputs are equalized among manufacturers, powerbands will still differ and that will determine which engine is 'better', thus giving an advantage. So then all engines will have to work and operate in the exact same way, until we end up with identical spec engines, and the only differences will be the manufacturer label on them. This will be great...