Different types / grades of stainless steel

There isn’t just one “stainless steel” everyone uses there are a vast number of grades and types for all applications and rust resistance is only one attribute

Iirc kitchen sinks are 304 and the cyber truck is a special 301 Tesla formulated. Marine is 316

https://en.m.wikipedia.org/wiki/SAE_steel_grades

There are also different ways to “finish” it citric vs nitric acid baths for instance