So interesting rabbit hole: Aldi was originally 1 company but split between two brothers into Aldi Nord and Aldi Sud (Aldi North and Aldi South) in the 1960s in Germany. The two companies share the same Aldi name, and work somewhat together but are separate and have their own territories. They are owned by the families of the original owners, and they do not compete directly against each other.

Aldi Sud covers southern Germany, eastern and southern Europe, the UK, Ireland, Australia and the USA. In the UK Aldi has got a reputation as a good employer, a discount supermarket that offers quality, and is the fastest growing supermarket. All the competitors now do "price matches" to Aldi to try and keep up. Aldi in the USA, Ireland and Australia are seemingly run very similar to the Aldi in the UK and of course in it's base in Germany.

Meanwhile, Aldi Nord covers northern Germany, the Benelux countries, France, Spain and Portugal amongst others. It seems Aldi does not have as good a reputation in some of these countries? I can see stuff about aldi being dirty, with poor products and poor customer service. Not sure how true that is, but that is definitely not Aldi's reputation in the UK where I live. Clean, good quality and happy staff is my experience.

So when you see Aldi in the anglosphere part of the internet, it's all about Aldi Sud. Also total random aside but the 2 companies do compete in the US: Aldi Sud runs Aldi, while Aldi Nord sort-of-owns Trader Joe's (it's a "sister company" owned by the owners of Aldi Nord).

EDIT: Also in the UK, Aldi and Lidl are very similar in quality and style. Although Lidl does more fresh baked goods, and I personally prefer it but Aldi is nearer for me so I shop there.

In California Aldi stores are clean and orderly. Product selection is limited but they offer healthy staples at great prices. Non-food items are hit or miss but interesting to check out.

In the UK Lidl and Aldi are budget stores with a mix of quality. Both brands sell their own versions of copyright with their own names (feels a bit like being in a parallel universe) that are normally on par but much cheaper