I am aware of the fact that PMPO means nothing and RMS or Sinus is the only wattage that gives a rough idea about the actual power.

Regarding the JBL Eon Compact I have new information for you: While the US manual just states the peak power of 150 W, if you look into the German-language manual, you will find the statement „Nennleistung 120 W“.
„Nennleistung“ is the permanent wattage, similar to RMS.
I don‘t know why JBL provide different specs for different countries, but it could be due to EU regulations...