 Alphatec NASDAQ:ATEC and Nevro NYSE:NVRO are both medical companies, but which is the better investment? We will contrast the two businesses based on the strength of their institutional ownership, risk, dividends, profitability, analyst recommendations, earnings and valuation. Earnings and Valuation This table compares Alphatec and Nevros revenue, earnings per share and valuation. Gross Revenue PriceSales ... 