Using the assumption you're a current DVC owner and adding on. I would suggest either adding on 150 at VGF or 150 at VDH. This way you get the best incentives possible. You can still try to use the 7 month window to go to the other resort.
If you added on the way you wanted - I calculated 100 VGF points at $217-$7 incentive = $21000 and 50 VDH points at $230 = $11500 for a total of $32500 before Magical Beginnings (if applicable in this scenario). If applicable then it would cost $29200.
If you added 150 VGF points at $207 = $31050 -$3300 Magical Beginnings = $27750.
If you added 150 VDH points at $208 =$31200 - $3300 Magical Beginnings = $27900.
Yes, you would pay higher MF at VDH but you would have a longer contract and it's slight more expensive than adding all 150 at VGF.
** This excludes closings costs for simplication **