Wish + Would VS. Wish + Past

Hi everybody! How're thing doing?

Well, let's get right to it ^^. I was studying these structures and I noticed they're are quite similar. While I was creating sentences, a doubt came to my mind:

I wish Maggie were more friendly. / I Wish Maggie would be more friendly.

I know Wish + Would represents dissatisfaction, worry.. while Wish + Past is used when we want to describe a situation that we would like to be different from what it is, but I believe this can be interchangeable. Is their any difference it their usage?

I'd be grad if somebody helped me! Feel free to correct any mistakes and thanks in advance