A pipe maker may offer different shapes, stems and filter arrangements within one range. The brand tells you who made the pipe; the exact model tells you which dimensions and fittings apply. Even similar looking pipes may have different filter specifications, so the product listing matters more than a general rule about the maker.
The same care applies to replacement parts. A filter size, bowl or stem name is useful information, but it is not a universal fit guarantee. Check the pipe model against the component listing and, if anything remains unclear, consult the maker’s documentation before treating the parts as a match.