What does one call a group of similar courses where only one can be taken for credit? Is there a word to describe the case when a student can only receive credit for one of a group of courses because they are versions of a single course?

For example, "Accelerated Elementary Statistics" and "Elementary Statistics" - these have different course numbers but I would only want a student to be able to take one of these courses for credit.

Context: I'm designing course scheduling software and want to be able to describe/refer to this situation concisely to inform students and communicate with administrators who are designing course catalogues and requirements.
A couple of universities that I've worked and/or studied that described the courses as having equivalent content.  So, the prerequisites for an upper-level course might be listed as "MATH 344 or equivalent content."

The reverse descriptor also came up sometimes.  For example, the degree requirements for a given major might include:  "Four additional courses at the 500 level, of essentially different content."  Another school used inequivalent content for the same thing.