Kirsty is less confusing but
Kirstie is more feminine. I guess
Kirsty wins.
Kirstin is KUR-stin for me.
Kristy over
Kristie.
Kristen over
Kristin.
Kristy over
Kirsty every time.
I don't think they're dated at all. I haven't met anyone with these names, but I would think it's cool if I did.
https://youtube.com/@MarioDrama632 or
https://youtube.com/@Objects_2763 :3