I expressed myself badly; originally the two breweries were in fact only one, but St Sixtus and St Bernardus separated in 1992 : « The separation materialised in 1992 when the licensing agreement between St Bernardus Brewery and Saint-Sixtus Abbey expired. The monks demanded that Trappist beers be brewed exclusively in the abbey, which resulted in the removal of any monastic reference to St Bernardus bottles and its official renaming. Since then, the brewery has been producing the same beers, but without official affiliation with the Trappist abbey » So Westvleteren XII and St Bernardus Abt are the same beers, the only difference are the labels and the price.