How is this cable different from #30006 ?

1. Type B cable does not have the alignment tab.
2. Type B's connector shell is about 0.2mm thinner.
3. Type B's physical appearance is different.

Electrically, the two cables are identical.

What are the implications?

Due to its mechanical differences, Type B cable works in a wider range of applications - for example, it fits in 24-V female connectors as well as the regular 12-V connectors. Because of its thinner shell, it also works in some European cars which do not follow the SAE J1962 access area requirements and whose connectors are molded into the dashboard.

Type C cable's physical features fully conforms to the SAE J1962 standard, and it can be argued that it has better visual characteristics.