Is Aldi/Lidl actually cheaper?

[CPHB2021]

Hello! Thinking of ways to cut our costs each month. Usually spend about £100 per week in Tesco/asda. Family of 4. Don't drink alcohol. Do you think Aldi or Lidl are genuinely cheaper and ok quality?

One of mine prefers the Aldi stuff and one does not!

Does anyone else’s children not like the stuff for there though? I bought cereal for dd and crisps and she wouldn’t eat either of them, I think they taste fine but she said they both tasted horrible, not sure if it’s saving money if the kids won’t eat it 🤣