Howdy!
We have both. The inexpensive one is the basic and the Highest one is all inclusive. My advise, if I may, do not go "unlimited"...I tried that one year (3 years ago) and I had to go 9-1/2 hours...I was pissed...My fault though..
Go with "Up to", there you're not stuck with 30 people out of 200 at the last 1/2 hour. C'ya!