As a kid, I preferred Stackpole's books over Allston's—I think because Corran Horn, my favorite X-Wing character, wasn't in the latter's—but upon rereading them, I have to say Allston was definitely the superior X-Wing author. Wraith Squadron is more cunning, more surprising, more thoughtful, and does a better job of distinguishing the characters. I'm looking forward to rediscovering his work.