Quite recently I managed to persuade some of hard-core Apple fans to switch to Samsung Galaxy S23 Ultra and they have an strong addition to Siri, even if in a few recent tests side by side; Google Assistant,
Bixby, Alexa and Siri, the Google Assistant was always the best one and Alexa was always the worst one.
They are three different reasons;
Siri is supporting more languages than Bixby,
Bixby, to be honest,
was quite useless a few years ago,
and a lot of people hate Bixby.
The most important reason is,
that Siri is always answering,
even if it's not quite helpful.
Something funny,
but Bixby very often:
"I don't understand".
Simply to "humanise" Bixby a little bit.
Of course, Bixby and Siri are biased,
because Bixby won't recommend an Apple,
and Siri won't recommend Samsung,
or another Android phone manufacturer.