Duvel Single Fermented is designed for the American market and released in the USA on tap, served in some local bars, and cans in a fair amount of grocery stores, as well as beer/wine specialist stores.

Duvel Single is similar and different then the bottled version.
Duvel bottled undergoes a secondary fermentation and is 8.5% Duvel Single draft is single fermented, and cold-filtered at 6.8% ABV