For instance, YC rather explicitly doesn't provide shared office spaces. The shared office space of a TechStars location is a large startup community galvanizer in the cities where TechStars has set up shop - and partially offsets the need to be in the Valley for those companies.

There's no question that TechStars is tweaking the YC model subtilely in its attempts to get global outreach. (This is a good thing, the world could use more experimentation.)