They are completely different programs under different departments. MSOR is designed for supply chain and such but over the years, people find ways to tailor their courses selection for FE. Be prepared for not getting any dedicated career services if your aim is to get into quant finance.
In this highly competitive job market, it's recommended to do a proper program with dedicated career support team that can better prepare you. Even with the right program, getting in is just the first and easiest step.