The diploma called “maitrise” is now a diploma that can be delivered at the end of the first year of study in what is called the “second cycle”; it is called an intermediary diploma; the diploma called “master” is delivered the next year. The “master” is what used to be called “maitrise”; you can’t get it before two years’ study in the “second cycle”, that is not beforet the end of the “second cyle”; if you have those two years’ study, either in France or in the UK, you should be able to say “master” as “master” corresponds to “master’s degree” in the UK.

À mon sens, le fait d’avoir un bac +4 ou un bac +5 dépend du nombre d’année d’étude mais surtout des crédits ECTS obtenus.

Le Master est une formation qui permet d’obtenir un Bac+5. Le Master donne le droit à 300 crédits ETCS. En effet, s’ajoutent aux crédits ECTS de votre licence ou de votre bachelor (180), ceux du master (120).

Information about ECTS: https://ec.europa.eu/education/resources-and-tools/european-credit-transfer-and-accumulation-system-ects_en

Check out this website, you should have more info about it per the country: https://www.studyineurope.eu/ects-system

Une source équivalente en FR: https://diplomeo.com/actualite-credits_ects_european_credits_transfer_system