You posted this clarification while I was writing my response. Based on the additional information, I would suggest that a USA PhD research op would present mo

You posted this clarification while I was writing my response. Based on the additional information, I would suggest that a USA PhD research op would present more advantages. Notwithstanding that, if you are attracted to the adventure of studying at Oxford and are able to secure a well-funded research position then it could be a fantastic experience.