Some offhand differences I see from YC are:
-3 weekly events with TS versus 1-3 with YC. - TS is more of an incubator. They provide office space. I tend to think this isn't good-- creates less of a sense of ownership for the founders, IMO. - Boulder, CO ... Not the best hub in the world. On the surface it doesn't seem to be impeding funding, but what about acquisition? - TS companies have less competition... ~300 applications, 10 accepted. - TS has a LOT more mentors, on the surface... No idea how engaged they are. - And the biggie-- The YC/PG brand clobbers TechStars...