It looks like we have 5 different soap bases now (in sequential order):
I suppose we should at least be grateful that Floris seem to have a strategy of continuous improvement after the penny dropped about the Sodium version; unlike Trumpers et al. I've used the Potassium Palmate version in the past; no issues with lathering, but post shave could be a bit better. The addition of cocoa butter in the latest version will have sorted this out.
For reference this is the original tallow version made by Floris themselves in Devon. On a par with hens teeth for rarity, I've seen a NOS one like this sell on US eBay for $100
Buyers beware though as there are bath soaps in the same wooden bowl for some strange reason