<p>I believe there is always some synergy from the grad and undergrad degrees because it will be the same professors and tons of research, which should help an undergrad gets some experience. Similar to Stanford. Sorry, I’m not aware of the 4+1 program. But my guess is that the 4+1 program allows one to get a master degree in one year vs completing a master degree later on, which will take 2+ years and you still have to apply. 4+1 is shorter, possible no GRE test. That may explain why a lot of students go to 4+1 program.</p>