I am applying for Master's program in CS. I have the following two alternatives:
An LoR from a startup founder for significant and relevant work. The possible problem is that the entire team consists of final-year undergraduates including founders, however they are from a relatively well-known university in the country that I am applying to (USA).
An LoR from one of my professors with whom my interactions have been only during courses and labs which are not directly relevant to my area of specialization.
Which of these would be more effective as part of my application?
My other LoRs are from a professor with whom I have worked on a relevant R&D project for almost a year, and one from a professor about coursework and labwork, which is relevant to the field.