It's an apples and oranges thing due to CoD's dedicated regular release schedule. It's hard to judge overall appeal when one franchise works on a yearly basis and others do not
Though one could argue that since CoD yearly sales match what GTA performs as part of a rough four-year cycle, that it is indeed the bigger franchise since it can sustain those numbers more regularly, though GTA cannot prove that it cannot sustain those numbers either

Monster Hunter: pissing me off since 2010.







