We had pizza at both Sal's and Via Napoli in June and I was very sad to discover that Via Napoli was better. However, that was the first time that my Sal's pizza wasn't incredible. I think it had been overcooked. Needless to say, I was quite disappointed but it was nice to find a really good pizza place in Epcot. The service was way better at Sal's though. We waited forever for our salad and pizza at Via Napoli.
I'll try both again in September and see if it happens again.