In resale price, the two are fairly close to each other with AKV averaging a little more. AKV has higher dues (currently $6.30 per point compared to VWL's 6.03). Some may think that has to do with paying for care of the animals but the main difference is actually property taxes. It appears all the
DVC resorts other than AKL are in Orange County. So is AKL but only partly because part of the resort is in Osceola County. That does not mean double taxation but the tax rates applied to the portion in Osceola are higher than those in Orange.
Outside the higher dues, AKV has some ownership advantages over VWL, the most siginficant of which is that it has a 2057 end date compared to VWL's 2042, and when that difference is considered its resale price is actully the better of the two. It has value rooms at low point cost for which you really need to be an owner to reserve. Even its standard rooms have a lower point cost than VWL but you can usually get those AKV standard view rooms 7 months out as a non-owner most of the year and thus that is not a significant ownership advantage. The animals may be considered an advantage but savanna and standard view are usually open 7 months out except for a risk otherwise during some extremely high DVC demand times and thus the animals can be considered only a small advantage since non-owners can easily get reservations. It has the better bus sytem of the two including because it does not share with any other resorts but that of course is soemthing non-owners can also enjoy.
Other than dues, VWL has some ownership advantages over AKV. Though it is open 7 months out much of the year, there are significant periods when it tends not to be avaialble 7 months out and those are the middle of Oct, the weekend in Nov when Food & Wine ends, most of Thanksgiving week, the first two weeks of Dec, Christmas week, and marathon weekend in Jan. If you want VWL for any of those periods then iyou need to seriously consider purchasing it.
Personal sense is that AKV wins the choice mainly because of the 2057 end date, but you are not likely to be wrong with either choice. Even if you do not personally expect to last beyonf the end dates, they could take on significant importance in 10 years or so when you might want to sell.