Formal vs direct
Tokyo, as the political and corporate capital, is often associated with a more formal, reserved public manner — a reputation Osaka has built its own identity partly in contrast to, leaning into a blunter, more talkative, more humour-forward local style rooted in the city's merchant-city history and its own dialect, Osaka-ben.
Food as identity
Osaka's self-description as kuidaore — eating until you drop — is a genuine point of civic pride in a way that doesn't have quite the same equivalent in Tokyo, where dining culture leans more toward refinement and presentation than Osaka's louder, more street-level food identity.
Small, real differences
A handful of concrete, well-documented differences back up the reputation: Osaka's famous stand-on-the-right escalator etiquette against Tokyo's stand-on-the-left, and Osaka's outsized role in Japanese comedy through manzai and Yoshimoto Kogyo, headquartered in the city.
A rivalry, not a hierarchy
None of this makes one city more 'authentic' Japan than the other — it's better understood as two major cities with genuinely distinct personalities, each with a healthy amount of pride in not being the other. Visiting both back to back is one of the clearest ways to actually feel the difference rather than just read about it.