[huwshimi]

You need to figure out what is important to you right now. How much does the money mean to you? Do you need to have higher, more stable income? Can you live with a slightly lower income for a couple of years? Are the benefits a deal-breaker? Obviously getting experience is your priority and it sounds like both will give you that (though it sounds like company 1 will give you more of the experience you are after).

One thing you didn't mention with the two companies is possibility for promotion. If you don't know I'd recommend talking to each company about room for growth and opportunities to take on different roles.

[juniorguy]

Good advice. I'll probably ask them. It seems to me that both offer areas of growth, but it looks like the prospects of getting a promotion are better with the startup (assuming they don't tank).