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Uber and Lyft have competed for riders and drivers across North America. They raced each other to go public. They even filed paperwork for their initial public offerings with the Securities and Exchange Commission on the same day late last year.

Now that Lyft is publicly traded and Uber’s own initial public offering is approaching, they’re also going to be competing for stock investors.

[Uber is losing $1.8 billion a year, its I.P.O. filing reveals.]

By most measures, Uber is much bigger and has a more diverse revenue stream.