I checked both and it's costing me an extra $50 over hotwire - but I get the flights I want, both non-stop so 2.5 hrs instead of 7 hrs, no going through O'Hare, and both ways, I have a backup flight (nonstop) that's only an hour later in case there's mechanical issues or a flight gets cancelled.
Worth $50 to me.
C ya there.
Bryan