To Clarify...
Disney's Pop Century - Classic Years Resort is located in the Wide World Of Sports Resort Area. It is just south of Epcot and Disney's Caribbean Resort, and just north of the WWofS Complex. All resort and room amenities are the same at all 4 Disney Value Resorts.
Rack Rates at the Pop Century are exactly the same as at the three All Star Resorts however due to the fact that the three All Star Resorts are located just south of the Orange County line, their taxes are 0.5% higher per night then all other Disney Resorts.
Disney's All Star - Sports, Music, Movies =
Tax: 6% Florida State Sales Tax, 6% Osceola County Accommodation Tax, 1% Osceola County Surtax = 13% total
Disney's Pop Century and all other Disney Resorts =
Tax: 6% Florida State Sales Tax, 6% Orange County Accommodation Tax, 0.5% Orange County Surtax = 12.5% total