描述
VHS vs Beta
The main determining factor between Betamax and VHS was the cost of the recorders and recording time. Betamax is, in theory, a superior recording format over VHS due to resolution (250 lines vs. 240 lines), slightly superior sound, and a more stable image; Betamax recorders were also of higher-quality construction. However, these differences were negligible to consumers, and thus did not justify either the extra cost of a Betamax VCR (which was often significantly more expensive than a VHS equivalent) or Betamax's shorter recording time.
[Videotape format war](https://en.wikipedia.org/wiki/Videotape_format_war)