True, so the question is whether these extra benefits are worth the thousands of dollars extra. Maybe they are, maybe not. I don't know. Compared to the HRC program, the flexibility of points, ability to bank, and access to portfolio inventory are the biggest advantages.
For me personally, the biggest eye opener was that the portfolio program is very small. People on the forum here were persuading me that the portfolio program is not very good, but I was skeptical of these claims, until I carefully looked over the documents provided to me during the sales pitch. The description of component sites provides the number of unit weeks at each of the resorts in the portfolio program:
Sunset Harbor: 202
Beach House: 643
High Sierra Lodge: 272
Windward Pointe: 1,347
Highlands: 989
Coconut Plantation: 2,035
Pinon Pointe: 1,065
Wild Oak Ranch: 2,546
Aspen Residences: 207
Buying HPP from the developer may make sense for someone who really values getting into the few resorts with significant HPP inventory.