I'm an MCP graduate (Boston). I will say MCP. Why? You'll learn once you hit the the 6th year that your rotations end up being at one of the best hospitals in the world, thus giving you leeway and connections to do things like fellowship or residency if that's what you're headed towards.
(Most of my rotations were at famous places and I made strong enough connections and clinical knowledge to land me to where I am now)