i've had both. Mostly on holidays in Northumberland. Mordue was the better of the two as i recall! I have found a few bottles of Workie Ticket down here in the past and always snap it up. I think it is on of the best bitters around; amazing malt profile, lovely lingering bitterness and extremely drinkable.
your asumpstion about Yorkshire pubs stockign Yorkshire booze is pretty accurate. There's a few near me that have up to 8 on at a time, half of which are sub standard - but from Yarksha.