Yes they are similar in content as the Exante bars ... also the Asda meal replacement bars and Biggest Loser bars are as well. I do prefer them to the Exante bars but some others prefer the Exante. Everybody's different but def worth a try! Still only one a day though x
Please don't shoot the messenger -Tesco like any other supermarket price items differently depending on what type of store it is (Metro, Express, Super, Extra) & what other supermarkets are nearby with similar offers. E.g. if Asda were nearby selling 100g chicken for £2.00 then Tesco would offer the same or BOGOF at £2.50 etc.
If you can find a group of supermarkets close together you will find better deals (petrol too).