A few notes after trying both Santa Caterinas.
Mentholated Santa Caterina - the one in the red sachet, with just a hint of eucalyptus and some undisclosed flavouring, listed as “Aroma Santa Caterina” among the ingredients - is much different than Konigsprise. I’m not sure if Konigsprise is still produced or discontinued, but it is still available at some Polish online stores, and is ghosting at snuffstore.co.uk. Schmalzlers aside, this Santa Caterina is one of the three camphor-free Poschl snuffs and second least-mentholated snuff in entire Poschl range (menthol-wise it’s on a par with Bayern-Prise Brasil, which is camphor-free as well). Now Konigsprise, as I recall it, is much stronger in nicotine and menthol, and has a strong, really special aroma.
And no, in comparison to plain Santa Caterina (blue sachet), the red one was not “the same thing, but mentholated”. Each was made of different tobacco and had their own chemical composition. I’ll write some more on it and upload photos next week.
My sincerest thanks to @schmalzlerfranzl for the opportunity to try these rare snuffs!