As far as I know there shouldn't be a price difference except in the cases where one resort isn't included in a discount/promotion offer.
If you look at just the main page they will show you what is the preferred room rate. If you actually select the hotel it will show you the standard and preferred room rate (provided one class of rooms isn't sold out)
Example:
Here is the main page for dates in September-
View attachment 223057
The price for All-Star Movies above will be for a preferred room rate, the price for All-Start sports above will be for a preferred room rate and the price for All-Star Music will be for a preffered room rate. Notice they are
average nightly rates shown. When we booked All-Star Sports (which by the way was the same price as Movies where we originally were going to stay but there were no more Standard rooms available) the two sets of Friday and Saturday nights were around $123 each night while the Sunday-Thursday rates were around $100 each night. It is confusing to say the least that they use the term "Standard Room Rate" and also have a "Standard Room" category.
Here's what each resort looks like once you click on each one:
All-Star Movies-
View attachment 223059
All-Star Music-
View attachment 223060
All-Star Sports-
View attachment 223062
Notice how the pricing for Preferred Rooms is the same pricing as what is shown to you on the main page. Make sure when comparing where you want to stay if looking at costs to click on the specific resort to get the actual rate. If you click on the link for "rate details" you will see the nightly rate versus the average nightly rate.