There seem to be more impactful coaches in the NFL, but think how dominant certain coaching systems have been in the NBA. I feel like there are more cases of NBA coaches implementing a system that the rest of the league just can't figure out or making an in-game adjustment that completely changes the rest of the game. The play-by-play strategy definitely seems much more intense in the NFL, though.

Undisciplined

I definitely think coaching strategy is quite important in NBA. I would say more so than Baseball and Hockey for sure but maybe not NFL. 

grayruby

Stacker Sports- Meta Takeover- Day 56

I've always thought it was football, but Spoelstra made a strong case for basketball during this past playoff run.

It probably only matters a lot in playoff basketball, as no one seems to take the regular season very seriously. That actually makes the comparison a little easier, since NBA Playoffs are about as long as an NFL season.

I think I would take Spoelstra's or Pop's playoff impact as being similarly important as Belichick's. There are definitely many games where those coaches were considered to be the decisive factors in the outcome.