Does anywhere have a good reference of the summary of differences between the Pathfinder Beginner Box rules and the Core Rules (which I believe are identical to the online PRD)?
Paizo provides a free Basic Box Transitions PDF to help you migrate from the beginner box to the main game. Also there is an extensive Forum Post detailing the differences - the summary is that the rules aren't different, just many rules are removed for the beginner box.
More detailed overview of the Forum post:
Skills & Feats