The research-based master (ex DEA) is a year-long course to initiate students into research via high level scientific teaching and a research-focused placement.
A doctorate is a course that aims to teach the discipline of research, leading to careers either in the public or private sector as a researcher or research/teaching fellow. Doctorate courses are overseen by the Doctorate Schools.
The "Diplôme de Recherche Technologique" (technological research diploma - DRT offers a vocational training course (in engineering or an equivalent), with a research placement in a company or laboratory.