Speaking as someone who just recently made the jump from a big company (ClearChannel, with 20k employees) to a startup (with 15 employees), I would suggest goin

Speaking as someone who just recently made the jump from a big company (ClearChannel, with 20k employees) to a startup (with 15 employees), I would suggest going with the smaller company to start. At a big company, you're more likely to see a higher degree of specialization, whereas in the smaller company, you'll see people wearing more hats. This should give you a chance to find what you like doing, so you can do more of that in the future. You'll also learn a lot more this way.