Difference between Mass Import and CSV import?

-- HikaShop version -- : 3..3.3
-- Joomla version -- : 3.8.5
-- PHP version -- : 3.5.6

What is the difference between Mass Import and CVS Import?

Hi,

They use two different import systems.
The CSV import will try to generate things automatically for you, while the mass action import won't.
The CSV import is made to import a CSV of all the products when you create a new store.
The mass action CSV import is made to update product information for products already in the database.