What size room is your preference and how many points do you think you need? I own at both, but it's just not cut and dry that BLT is the winner. I have been able to book BLT lake view studios with AKV points and HHI points over Christmas week. I think you can easily get BLT during slow DVC months for sure.
Figure out your most typical resort room type and when you are most likely to travel. Most BLT rooms require a minimum 20 percent increase in points to book (standard) vs AKV, and another 45 to 50 percent in initial purchase cost. If you get value rooms, the gap is even wider. BLT room can be at a 50 percent premium to book a week.
BLT for a week is 250 points during dream for a 1 bedroom (standard). At $115 pp, it will cost $28750.
AKV during the same week standard is 200 points. At $78 pp, will cost you $15,600.
Even if 200 AKV points cost $300 more in Maint fees per year than BLT, it will take 43 years for you to make up the difference.
I haven't even factored in the ability to book value rooms or the simply fact you came up with almost half as much money.
I think when BLT was in the 90's it was cheaper than AKV, but it's run into the 115 to 120 range makes AKV look all the more better.