Does a supernatural Follower cost more BP than a mortal?


I’m a bit unsure on how much to have one of my players spend on a supernatural follower of his.

In the rules it states that:

Followers are assumed to have 3 in all Attributes, but the Follower gains 4 skill points for each BP spent to reflect the skills they use to help the character.

And that

This Gift, unlike Bonds, can include magical beings or even other gods at times, but are usually mortals who simply follow the character.

I’m understanding how to build the character itself with the points the player has to spend, but what I’m really unsure of is: does it cost more to gain a supernatural ally (like a kitsune, succubi, …) instead of a mortal?

Thus any explanation from a book I don’t have or from another source is welcome.