People argue about these styles because they sound subjective. But you can compare them on a few practical dimensions: look, texture, and how safely repeatable the result is at home.
| Feature | Blue steak | Rare steak |
|---|---|---|
| Center look | Very undercooked; can look raw or deep red | Red throughout |
| Texture | Extremely soft; almost custardy | Soft and tender; clearly cooked but still red |
| Crust | Very important; outside is where flavor lives | Important; can be slightly deeper |
| Timing tolerance | Lower margin for error | More forgiving than blue |
| Home cooking reliability | Best with a thermometer | Still best with a thermometer, but more forgiving |
In short: blue is for cooks who want maximum crust and minimum cooking time. Rare is for cooks who want the red center without chasing the line so aggressively.
