I am applying for admission to the Master's program next fall. However I am in doubt about the source of reference. I have two options:
My mentor at a research institute who was pursuing his PhD. when I was a research intern. However, he did not complete his PhD.
Research Scientist(PhD) at my current organization where my role is that of a software developer. Therefore the recommendation is based on my work as a developer rather than on my research contributions.
Both are willing to write strong recommendations for me.
Who would be a better source of recommendation?