I may be able to offer a little perspective. I graduated from Tufts Medical School and am currently an Ortho intern at Boston Medical Center. As a med student I rotated through both programs. Tufts' hospitals are NEMC, New England Baptist, and Newton Wellesley. They also rotate to Rhode Island Hospital (Brown) for some trauma experience during their 4th year. The program is strong in sports and joints (mainly Baptist), and Dr. Cassidy is great to work with (Hand/new Chairman). The downsides I felt were little trauma experience (NEMC is level 3), and it seemed at times there were not enough cases to go around/residents double-scrubbed. They are definitely in a rebuilding phase as Dr. Cassidy just took over last year and they had some attendings leave NEMC. That said, it is still a great program and will provide you with the skills you need to become an orthopaedic surgeon. BU's hospitals are BMC (which is Boston City and University combined), Shriner's, VA in West Roxbury, and the Lahey Clinic. BMC is level 1 trauma and very busy! You spend 2 months doing trauma as an intern, 2nd year, 3rd year, and chief. Everyone takes trauma call though. We are trauma heavy, but it does not overshadow the experience on the other services. We have some big names here like Tornetta, Einhorn, and Schepsis, which is a plus. Every day we have board rounds at 6am and go over all the traumas and operative cases with Dr. Tornetta. On Fridays we have bone school with great didactic teaching and we go over articles and chapters of the OKU to prepare for the OITE. Overall you get a great experience in all areas. I don't have too much time to go on and on, but if any of you out there have specific questions you can pm me.
Good luck!