job prospects for any kind of Masters (MFE, MathFin, MSOR) is almost same. Currently it is not good. Employer does not really care about name of your program, he really cares about what u know. And here begins the difference. Suppose you study everything well according program curriculum then from MSOR u have almost NO chances to get a job in a top firm. Why? Because the stuff you studied is not enough (and it not tailored) for finance. So if u are in MSOR u have to study much more - first, your curriculum, second, finance curriculum. General stuff in almost same (probability, simulation, some math). But MSOR curriculum has almost no stochastic calculus and related stuff. So it is your responsibility to study it by yourself. On spring you take almost all courses as MFEs, but it has sense only if u know prereq stuff (stoch calc, finance, programming, etc.). In sum - MSOR is not a worst choice, but definitely it requires you to study much more.