I'm an international student in the US and I have just finished my 2nd year in a PhD program at University A. During my coursework, my research interests evolved significantly and they're not aligned anymore with faculty expertise in my department. I have expressed my wish to apply elsewhere in the US in order to 'continue' my PhD in a more suitable environment and my supervisor and committee have been supportive. My current PhD program doesn't award MA degrees. However, another department I've worked with very closely offered to give me an MS under a few conditions that are irrelevant here. (NB: By the time I graduate, I will have received a full ride from both programs).
As I will likely leave University A with a Master's degree, should I explain in my application (statement of purpose, etc.) how I transitioned from a PhD in one department to a Master's in another? Or should I avoid doing this and work on my applications as if I were a 'regular' master's student instead?
P.S. I know there's no such thing as 'continuing' or 'transferring' a PhD at another University per se, but for the sake of brevity I thought it best to use this vocabulary!