Except Ezra rejected the dark side whereas Ahsoka here is embracing it. That's why the Son is appearing to her, to further tempt her towards the dark side.
Ahsoka rejected the Jedi but that doesn’t mean she went dark side - I can’t remember her ever even flirting with it
But Ezra has has been hyped by both Maul and Palpy
also
I think both Baylon and Ahsoka are after the same thing- a Force that is a mix of light and dark , not a binary either/or
But Ahsoka is more on like a Buddha grassroots notion (no institutions)
While Babylon’s is a bit more hidden- but if I’m guessing, it has something to do with witchery (maybe even getting rid of magic, whatever that would mean)