What is the difference between the high top seating and the regular seating?

In each row they have both, regular tables near front or row, high tops on the back with an aisle between.

I've been there 3x and have always just had a regular table. I don't recall any high table tops at the show since they serve the family style dinners to each table. I'm fairly confident all the tables are normal seatings. There are high areas at the show but that does not affect your ability to enjoy the show.