Very flavourful, not hot.
The flavour of Truff hot sauce is fantastic, beautiful chilli flavour and the truffle just puts it over the edge. Totally sublime! But... Not hot! At all. It is the mildest hot sauce ever to call itself hot sauce. The Truff 'hotter' sauce is hotter, so it's hot, but really it's as mild as I would expect a mild hot sauce to be. So they're both really really enjoyable, just not as hot as I expected. Very flavourful, not hot.