Assuming you haven't already purchased the 8day hopper, then yes. Definitely.
The cost of the Sorcerer Pass is $1099. The cost of a 4 day hopper in Dec is $756.45 and the price for an 8 day hopper in the spring is $885.69. You'll save over $500 if you go the AP route.
Couple of caveats:
1) Sorcerer Pass is blocked out from 12/21 - 1/1, so your Dec trip needs to be in the first 3 weeks of December or the Sorcerer Pass won't help you.
2) not knowing your exact dates, I've picked start dates that have the lowest per day cost. Therefore, you may actually save a bit more.
3) these prices do not include tax
Steve