Hard choice but
A poll should be started though
I would, but if a poll were to be made comparing their coaching careers, people would not just go with that and vote along with GM'ing, how they are now, etc, and not just based on their entire career.
Both are great coaches, but I think BeliGOAT is the greater coach when taking everything into account. At the end of the day, two or three players can bring you a championship in the NBA with no revolving door. In the NFL, you need a team full of 50+ players with a revolving door every single season.