TWD has the best code Stern has done since TSPP/LOTR/WPT. I'd put it way above GB in every respect. AS made a good impression, but a bit too early to compare to other games out there, who knows how it'll stand the rest of time?
We're I in the market for a newer Stern I would wait to buy near the end of the year. If the rumors are true and they do Star Wars the market will flood with recent Stern releases for sale.