When you're looking for a cannabis stock to invest in, does it pay to go for the bigger players that are both deep and broad in their markets, or to stick with the smaller upstarts that are more likely to grow rapidly? There's an argument in favor of both approaches, and that's exactly what I'll be discussing today by comparing and contrasting Sundial Growers (NASDAQ: SNDL) and Tilray (NASDAQ: TLRY). Will Tilray span the globe?