You might be right. The 500ml tubes are tallow free and so are the 150ml tubs with the premium scents. The 1kg blocks - where available - show tallow but some of my goto European vendors are sold out now for ages…
Maybe Susan Darnell/Vitos had some production issues and that’s why the availability is so spotty…
@zoidberg mentioned a newer product catalogue that shows more tallow free bases.
If you look on UK eBay, there is a seller who has vegan and tallow formula Vitos Green. He has pictures of the ingredients lists for both. If you look at Connaught Shaving, their listing is for the vegan formula.
Here is a picture of the vegan formulation's ingredients list
And the vegan formula is only on sale at Goodfellas Smile.
As for Connaught Shaving stocking the tallow one, they were until a few months ago then they switched to the vegan one before they stopped selling a lot of European products due to Brexit.