They are two of the most dominant stocks of the past decade. Investments in Amazon (NASDAQ: AMZN) and Netflix (NASDAQ: NFLX) have returned 2,500% and 10,600%, respectively, over the past ten years.While investors who were insightful enough to buy and hold over that time frame caught lightning in a bottle, investors today are left with a difficult question: Between these two, is either stock worth buying?