minute difference; tiny difference; razor-thin margin
Used for very small differences in measurement, comparison, or competition. Often appears in contexts like sports, science, or statistics.
There is only a minute difference in ability between the two.
In this experiment, a tiny difference produces a large difference in results.
Compound of 微 (bi, 'minute, tiny') and 差 (sa, 'difference'). The reading is on'yomi.