The count I heard as far as freeplay machines at York was 168 on Friday but I know there were a few less Saturday. I have never been to Expo but both York & Allentown are well worth attending.
I will say when you go to York jump into your vehicle and go get food off the Fairground. Lots of great places to eat with in a couple miles but food at Fairground is both high priced & not very good as far as I am concerned.
The best part of York is the relaxed feeling of that show. I wish the flea market was bigger and also wish there were move vendors inside but overall it is a great show.
Allentown seems to be more busy, more lines waiting to play a specific machine, etc. but the flea market is a nice size and food at Farmers Market is always great.
Nice thing is these two shows are about 6 months apart so it works out great. Expo always being a week or two after York makes it tough to hit both but don't underestimate York for a great place to play some pinball. If possible I always try to make Allentown & York. Next year I am going to try to hit all 3.