 Principia Biopharma NASDAQ:PRNB and REDHILL BIOPHARS NASDAQ:RDHL are both medical companies, but which is the superior business? We will contrast the two businesses based on the strength of their risk, valuation, dividends, profitability, institutional ownership, earnings and analyst recommendations. Profitability This table compares Principia Biopharma and REDHILL BIOPHARSs net margins, return on equity and return ... 