Neochilenia and Neoporteria are cactus that belongs to the genus of Eriosyce. They are mostly globose, somewhat cylindrical, many of them are considered unique. Some growers distinguish the two in this way:
Neochilenia have short to no spines, and funnel shaped flowers that enable the inner part of the flower to be clearly seen when fully open. The floral tubes of Neochilenia are hairy and these later form hollow, fleshy fruits.
In contrast, species in the Neoporteria group have denser, longer spines in general than Neochilenia. The flowers are bright pink with yellow interiors and are more of a tube shape as the inner petals remain mostly closed. The outer petals flare out and thus, the flower is not truly a tube shape as other cactus genera, but even when fully open, the inner parts of the flowers are still obscured by petals. The floral tubes may have a little fuzz and form similar fruits to the Neochilenia group.