So I pronounce
Kylie with a "KIE" and
Kailee with a "
KAY". Through trying to work out what you mean, you want pronounce
Kai as "KIE"? So not the difference of pronounciation you were wanting (If I was to try saying
Kailee as "KIE-lee" it just sounds exactly the same as
Kylie to me).
In spelling,
Kailee or
Kailey looks the least confusing to me. Kaile looks like it's "KAIL".