 Rubius Therapeutics NASDAQ:RUBY and GENFIT S AADR NASDAQ:GNFT are both small-cap medical companies, but which is the superior investment? We will compare the two businesses based on the strength of their earnings, risk, dividends, analyst recommendations, profitability, institutional ownership and valuation. Profitability This table compares Rubius Therapeutics and GENFIT S AADRs net margins, return on ... 