The air-taxi dream is edging closer to reality, and two names are still fighting for the first boarding pass. Joby Aviation Inc (NYSE:JOBY) and Archer Aviation Inc (NYSE:ACHR) both promise to make flying cars an everyday thing — but their latest earnings show how differently they're trying to get there.Joby's Sprint Toward CertificationJoby's latest results weren't pretty — a wider-than-expected loss per share and only modest revenue of around $23 million.But what investors really care about is progress, an ...