Timestamp comparisons raise TypeError in some cases where datetimes do not:

ts = pd.Timestamp.now() ts2 = ts.tz_localize("UTC") dt = ts.to_pydatetime() dt2 = ts2.to_pydatetime() >>> ts == ts2 # <-- TypeError >>> dt == dt2 False 

The datetime comparison will raise for inequalities, just not == or !=.

Changing this behavior would be an API change, but it would likely simplify a bunch of headaches (including a bug in array_equivalent)