As a Haas 2nd year who interned at a large bay area tech company, I'd love to talk you into coming to Haas. But take the money at Kellogg and don't look back.
Haas will give you amazing opportunities to network with these companies throughout the year and work on projects for them, either for class credit or as in-school internships. You'll have a robust network in bay area tech through both the FT and PT programs and both big and small tech recruiting at Haas is very strong. I'm in love with this place (Haas), and am happy to chat offline and give you my best sell.
Wharton has the brand, though I'd argue this is less important in the bay area than on the east coast. SF semester is a great option (though I hear competitive to get into), and the exec program here also taps you into a growing local tech network. Haas and Wharton had the most MBA interns at my company this summer.
But Kellogg even without money is up there in terms of opportunity, especially in marketing. Kellogg MBAs were all over my company (including my boss and her boss) and while Wharton alums tended to be in biz dev or finance, Kellogg was better represented in ops and marketing (anecdotal evidence, but peruse your target companies through LinkedIn to research this yourself).
In my opinion none of the advantages of Haas or Wharton come close to being worth $100k. Congrats and good luck!