What is the main difference you spot between them?
Lidl is still newer here, so I have only gone once. They seemed similar, but maybe Lidl had more fresh bakery items.
There is a section called Lidl in the middle, that's where they mark stuff down. You can get some real bargains in there. We recently got heavy duty cable socket extensions with 5 plugs and 2 usb's, they were £2. Bird boxes £2. Ankle sox £1. We get lots of stuff as stocking fillers for xmas. Got my daughter a weather station for £4.
Some folks prefer iced coffee and some hot coffee. Which do you like? (For the coffee hater you can sub tea here.) I prefer mine hot with a sugar free flavored creamer. I prefer the liquid but, the powder is less expensive.