The prior posters have summed it up well. I have 3 points to add:
1) There are also a concentration of HGV properties in NYC with a total of 5 with 2 new properties expected by end of year. The other TS companies only have one. That has pros and cons. con: Those are by Hilton Club points (bHC) which are a more expensive tier of points. You can use club points in NYC but will need to reserve 120 - 60 days in advance after the owners and bHC points members have gotten first reservation priority. On the pro side, with 5 NYC properties this brings much inventory to potentially reserve with club points for the next few years. You many not get the penthouse or some of the units with Central Park views but will have a reasonably good chance to get access to NYC until the buildings sell out.
2) FYI below are the new locations/properties that HGVC has announced pre-Covid:
Officially Announced or recently opened
1. Saint Philip, Barbados: HGVC @ The Crane (partially open)
2. New York, New York: The Quin by Hilton Club (sales in progress)
3. New York, New York: Central at Fifth By Hilton Club (sales in progress)
3. Cabo San Lucas, Mexico: HGVC or bHC Hilton @ Los Cabos
4. Chicago, Illinois, Club (now open)
5. Ocean Tower, BI (partially open)
6. Waikiki, TBD(new build)
7. Okinawa, Japan
8. Charleston, SC, TBD club or bHC
9. Maui, Kihei HI ( New build, 2022 opening)
10. The District, DC By Hilton Club (now open)
Rumored
- Turtle Bay, HI: HGVC @ Turtle Bay "rumored"
- Ambergris Caye, Belize: Mahogany Bay Resort & Beach Club @ HGVC "rumored"
- San Francisco, CA: "rumored"
- China: "rumored"
3) I expect that HGVC will continue to pursue expansion to compete with MVC. About half of the above properties are co-located with Hilton Hotels, so can expect more Hilton hotel floor and wing conversions. HGVC also has a large Asian base (particularly in Japan). We could expect more Asia and Pacific Rim to satisfy this base. FWIW I would love for HGV to buy Welk (but that's just my wishful thinking at this point; no word from HGV on this.)