In Germany, there are two kinds of Netto supermarkets. They have the same name, but a different logo. They are different supermarket chains.
Netto with the dog
Netto ApS & Co. KG has around 350 branches in Germany. Most branches are in the east. It belongs to the Salling Group, a Danish retail firm.
Netto without the dog
Netto Marken-Discount has around 4,000 branches in Germany. It was founded by Spar (a supermarket chain), and taken over by Edeka (another supermarket chain) in 2005.
What is the difference?
Netto (with the dog) has more types of products, including bio options. The stores are often bigger.
Netto (without the dog) is cheaper. It’s a competitor to Aldi, Lidl and Penny. The stores are often smaller.