I have not tried all the PWA themes of these parties. I just started using Tigren's and found it to be quite good.
However, what bothers me more are the add-ons that come with it. It takes quite a few Add-ons to build a good PWA. I found a few others like Landofcoder's Magento 2 Multivendor Marketplace PWA Studio Solution.
It is best that you refer to the demo and ask the parties for advice