Buy this, NOT that, says Mario Gabelli By: CNBC.com News October 23, 2014 at 10:17 AM EDT "The Walking Dead" versus "Homeland"? That question can actually start a stock-picking discussion, believe it or not. Read More >> Related Stocks: AMC Networks Cl A Apple CBS Corp Coca-Cola Company Dr. Pepper Snapple Group Gamco Investors PepsiCo