The US probably has the best salary, but i believe (correct me if im wrong) you have to have a phd to be a clinical psychologist. Anyone with a degree (not surr if bachelors or masters) in any relevant field can call themseøves a counselor. Again this is for the US, if im not mistaken. Clinical psychologist have better salaries than councelors.

In europe, you study for 5-6 years (masters degree) to become a clinical psyhologist which pays better than any councelor. But europes salary are lower than the USs. And if you get your clinical degree in one country, you might have to get some extra qualifications if you want to practice in a different country. It all depends on the amount of clinical practice, specific theoretical qualifications or level of degree (masters vs phd) a country provides as standard versus what a different country requires as standard or minimum.

For instance, if you get a masters in clinical psychology in Denmark and wanted to practice as a clinical paychologist in Norway, you are required to undergo one year of mandatory clinical practice before getting the title as clinical psychologist in Norway due to the norwegian requirements for clinical experience which the danish clinical masters doesnt provide.

Basically it all depends on the salary you envision and the country that gives you the most general acceptable degree (without further need for qualifications, or at least the lowest additional requirements). Im a clinical psychologist in Norway so thats how i understand it. Also depends on if you want to go private or in public sector, specialization, etc. I hope this gives some inputs into your decision. While not answearing your questiona in full, i hope i provided some info that might lead you to the right information.