Points are points. Resale buyers get the same points per unit that full-freight buyer's get. HGVC will sweeten the pot for retail buyers a bit with bonus points or HHonors points, but they don't begin to compensate for the extra expense.
Also, resale points won't count toward elite status which starts at 14K. However, even those here who enjoy the red-carpet treatment of elite status will tell you that the extra perks don't cover the extra cost, either.
Unless the season/location you want is in high demand, it matters not where you buy as the "club" booking window that starts 9 months out is sufficient. OTOH, if it is a week in high demand, the 12-9 month "home week" window gives you a leg up on the unwashed masses.
.