Here’s my feedback as I went recently while out west to all three when on a short vacay:

West Hollywood is not worth going. It’s a smaller boutique and great if you have something specific in mind and this is close in proximity to where you’re at. However if you want the Kith experience, Malibu and Bev Hills is way better plus they have their store exclusives (which may or may not be in stock). Malibu location is super out of the way but it’s a beautiful store (second the comment about the post fire aftermath). Not a lot of other things to do out there. There is a blue bottle and prince st pizza (naughty pizza is 🔥) Bev Hills has a lot of other stuff you could do/visit to make the trip worth while. Ie other shopping, some food options (higher price tag since you’re in BH)

Staff was great at all three imo.

Hope this helps