I went to Wolfgang Express once, about a year ago, and it was NOT a good experience. We ordered our food (I got one of the pizzas, my fiance, she got a salad), and went outside to eat under the canopy area. About halfway through eating our meals, we began to notice a few cockroaches running around. Then more appeared. Under tables, on tables, on the window glass of the restaurant...we're not talking about just two of three of these guys. OK, so it was outdoor seating. I can understand at least somewhat, how it might be hard to control them out there. So we picked up and moved inside. And we saw them in there too. To say we were grossed out is an understatement. It was horrible. We never went back. The actual food might have been OK, but the bug situation has tainted our memory of it all.
Now, supposedly Wolfgang Express just underwent a renovation/refurb, and they supposedly changed their menu. Hopefully they took care of the cockroach problem. So it might be much better than it was when I tried it.
But if it's between Earl (which is SO good and relatively cheap), and Wolfgang, the choice is simple. At least for me it is.