I’m using PM standard and MPAH(only the enrichment book). Me too I live in Europe. I think they both are great curricula, but the syllabus is slightly different. I think MPAH is better, for example MPAH introduces all the times tables (1-10) and later long multiplication and long division, while PM introduces 1-5 and 10 times tables, later long multiplication and long division, and after all the 6-9 times tables. In PM the words problems are put together with other types of exercises, while in MPAH there are chapters expressly dedicated to words problems AFTER a topic is well mastered through other types of exercises.
I'm thinking about leaving PM and beginning to use PMAH after finishing 3A and 3B levels, that I already bought.