IDEs understand preprocessor macros, so IDE features (jump2def, etc) work with this. IDEs also can expand the macro invocations. So, I prefer the macros when possible :-).
Do they? X macros often are used with token pasting (https://gcc.gnu.org/onlinedocs/cpp/Concatenation.html), as for example in (FTA)
#define AST_BEGIN_SUBCLASSES(NAME) START_##NAME ,