American Axle & Manufacturing (NYSE:DCH – Get Free Report) and China Zenix Auto International (OTCMKTS:ZXAIY – Get Free Report) are both small-cap auto/tires/trucks companies, but which is the better investment? We will compare the two companies based on the strength of their institutional ownership, profitability, valuation, analyst recommendations, dividends, earnings and risk. Valuation and Earnings This table compares American Axle & Manufac…