@Override
		public int compare(Address a1, Address a2) {
			Address address2CompatibleWith1 =
				SimpleDiffUtility.getCompatibleAddress(program2, a2, program1);
			return a1.compareTo(address2CompatibleWith1);
		}
Used to compare the equates in two programs.
Ghidra/Features/Base/src/main/java/ghidra/program/util/ProgramDiff.java