Depends what you'll get more use out of.
Wedding Stories? It's less of a disaster than when it first came out thankfully, so weddings work as they do, but also has some micro managing to it. Could have did more with it, but it is what it is unfortunately. CAS is very beautiful in formal attire for everyone. BB some very lovely items in it that can be used for more things than just a wedding. Toasting ice bucket and the traditional tea set makes for nice gameplay items to use normally or for parties. Sims can even serve tea to another. The new world is very beautiful, wish it had more lots though makes for a nice vacation spot at least, but you can buy and try samples of wedding cakes. Can make your own if your sim has a high level of cooking.
Werewolves is a nice pack if you enjoy playing with occults or just like causing havoc. Because Werewolves are definitely a menace to society when rampaging. I'm not big on them, but I enjoyed playing around with them and just peeing on all the things, especially in Sim's homes. If anything I LOVE the grunge BB and from CAS. I always love really worn and repurposed items. Use them more than anything since I like my sims living in run down homes. Things get a bit sticky and funny when there's a rampaging werewolf outside of the world like at a club and terrifying everyone and ruining their night.
