EDITOR'S OPINIONThis is another time where I go with the original actor. Megan was really good as Gwen, she fit for when Gwen needed to be strong and feisty yet could go nice and caring plus she had some good chemistry with Tara. However, Ashley does pretty good. While at first she seemed off (and for some reason Gwen seemed less mature than she should have) but Ashley did improve after a couple episodes. She was also fit for when Gwen needed to be strong and feisty but could still be kind (though she didn't get as many caring scenes) and she sounded kinda like Megan. Still, Megan takes my vote.