大差

1. Origins, structure, and basic meaning

• Structure: 大差 (たいさ) is a noun for a conspicuously large difference between two results or quantities.
• Basic usage: 大差がない denies a substantial cost difference between two proposals, while 大差で終わる describes a final ending with a wide score margin.

2. Common pitfalls and similar expressions

• Negated difference and wide-margin result
  • 大差がない says there is no large difference, not necessarily no difference at all. By contrast, 大差で presupposes that the competitive margin was wide.