 Pro-Dex NASDAQ:PDEX and Cerus NASDAQ:CERS are both small-cap medical companies, but which is the better investment? We will compare the two companies based on the strength of their institutional ownership, analyst recommendations, risk, valuation, earnings, dividends and profitability. Volatility and Risk Pro-Dex has a beta of 1.2, meaning that its share price is 20 more ... 