VAG petrol engine 1.4 or 1.8 TSI engine

Hello and stay healthy ! I would be happy about information about my upcoming car purchase. I would like to buy a Seat Leon – in question would be a petrol engine for me. I have the 1.8 liter with 179 hp in mind, but the 1.4 L with 150 hp is offered more often, because one has still other things in mind or the promises should be made … Which engine is unproblematic or where there are known engine problems or even damages – am grateful about info ́s ! 2015 to 2019. What has VW / VAG built there of technology ? In advance thank you ??