75-ball and 90-ball are the two dominant bingo formats worldwide, and the split is mostly geographic. 75-ball is the standard in the United States and Canada — a 5×5 grid with a free center space, played under the B-I-N-G-O columns, where players race to complete a pattern. 90-ball is the standard in the United Kingdom, Ireland, Australia, and New Zealand — and, under the names Housie and Tambola, across Australia, New Zealand, and South Asia — a 3×9 ticket with 15 numbers, played for three separate prizes in a single game.
Neither format is "better" in any absolute sense — they optimize for different things. 75-ball gives hosts flexible pattern variety (lines, corners, blackout) with one winning stage per round. 90-ball gives every game a built-in rhythm of three separate prize stages, which keeps a room engaged even if they don't win the big one. Either format can produce tied winners on the same call, so "one stage" and "three stages" describe the prize structure, not a guaranteed headcount.
If your players already know one format, that familiarity should usually decide it — introducing a new format to a group that has never seen it adds a rules explanation most casual game nights don't need.