Any manufacturer is free in choosing the name for his components.
Often, when a part is very similar if not identical, to another part, the name of the part contains a generic part number (here: BAT60) and an arbitrary number of arbitrary manufacturer-specific addenda, like "A", "B", "JFILM". The list is not even complete. Infineon, for example, has a BAT 60A E6327 etc.
Even the same manufacturer may add additional codes to identify e.g. different case styles or different selections (e.g. LED binning or transistor gain binning - I know, not applicable here).
For many discrete parts one can find also so called "cross reference" lists on the internet (used to be thick books printed on very thin paper
). These cross references should be taken as a guide to identify
possible alternatives. One should, in my experience, never take the compatibility suggested by such lists as granted. The final truth is always found by comparing datasheets for relevant parameters.