Dove Cameron is a good job with a new hero Gwen Stacy, having a younger voice while still having a good delivery on some lines. I also enjoyed her new take in the Marvel Rising series, where she goes a little deeper and even has a bit of a "squeakiness" that I like. All around a great performances no matter which one your talking about.
Avengers Academy is known for its hit or miss performances and, sadly, Heather is a miss. While her voice fits the character, her delivery sounds like she just woke up from a nap. I hope one day she gets to reprise but sadly she might be my least favorite.
Kira Buckland had very little to work with but I like what I heard. I think given the shot, she could be a great Spider-Gwen.
Laura Bailey naturally works as well here as she does as Gwen, she shows off her dramatic acting chops nicely. My criticism is that she doesn't get a lot of quips and jokes so I feel she comes off too serious. Still, a great performance from Laura even if it doesn't stand out as much as some of her other roles.
I like Emily's voice for Ghost Spider. That said, she gets really generic lines so she doesn't stand out as much as the others.
I like Reba's voice for Spider-Gwen, I enjoyed this drier take on the character. Helps sell her as something other than "Female Peter Parker". For only one short, Reba really impressed me.
I like Hailee has a more punk rock performance, which is fitting. A nice mix of funny and awkward (in a good way) delivery but has the more somber moments down. A great performance from a movie with several great performances.
I will say Reba, Hailee, and Dove are my favorites, Ashley and Laura second (funny enough, for having opposite problems) then Kira, Emily and finally Heather.