What is the difference between a smartshop and a headshop?

A smartshop sells psychoactive substances and herbal products (truffles, kratom, supplements), while a headshop sells smoking accessories and paraphernalia (bongs, vaporizers, pipes, grinders, rolling papers). Many stores in the Netherlands combine both, selling substances and accessories under one roof. The key distinction is product focus: smartshops focus on consumable products, headshops on accessories.