 Stealth BioTherapeutics NASDAQ:MITO and Tetraphase Pharmaceuticals NASDAQ:TTPH are both small-cap medical companies, but which is the better stock? We will compare the two companies based on the strength of their analyst recommendations, profitability, institutional ownership, risk, valuation, earnings and dividends. Analyst Recommendations This is a summary of current ratings for Stealth BioTherapeutics and Tetraphase Pharmaceuticals, ... 