BUG: PeriodArray comparisons inconsistent with Period comparisons
The second of two non-cosmetic changes mentioned in #30720.
does this slightly change conversion semantics? e.g. the bug part, if so can you add a whatsnew thanks, IIRC you mentioned that we were going to deprecate comparing * raw strings* to Periods as well? > IIRC you mentioned that we were going to deprecate comparing * raw strings* to Periods as well?

no such plans.  with this in im planning to share the DTA/TDA/PA comparisons, then fix some inconsistencies in searchsorted (so that DTI/TDI/PI can dispatch to their EAs)