We are recent resale SSR owners ("white card") and we were at Aulani in Feb 2020 before the world went nuts. Here are the things I noticed being a resale owner, and it was our first DVC trip as resale owners:
1. Staying on points, you get free parking and free laundry tokens (if you need them).
2. Your reservation will say "DVC member" which means that every time you go to pay or do something, the CM will ask you for your membership card. When they see that you are a "white card" some CM are confused. They are honestly trying to give you whatever discounts apply, but they effect to me was annoying, so I would just say: "we're resale" and then the CM would move on.
3. Aulani offers some DVC member only events like tastings at certain of the restaurants and DVC tours. We didn't try to attend these events so I am not sure if they are direct only or direct Aulani only. They seemed to be temporary type events that would change periodically.
4. We took part in community room activities without an issue as resale members.
5. We enjoyed our rooms just like everyone else - and on SSR resale, even better!!
6. Oh! Direct DVC owners get a sparkly arm band in the pools. We got regular old non-sparkly ones, shucks.
Overall, other than the general annoyance of being asked for our membership card repeatedly- once I got that figured out and headed it off, life was awesome in Aulani. Now thinking to go back in 2021 vs. going to WDW!!
If you are value buyer, there is NOTHING worth thousands of dollars worth that you are missing if you go resale over direct. Good luck!