My two cents lol
?What if the engines is identical but the difference is in the ecu rpm ?? for example p80 & p120. buying the p120 does not mean you got a bigger engine.

MAT the best thing is to do some research on the smaller engine compressor and turbine wheel size and compare it to the higher
thrust engine. If its the same then the difference is in the ecu.

You can play with the ECU rpm limiter circuit.