Never had duck or goose... But, If I had to guess... Goose would PROBABLY taste better.
https://besthuntingadvice.com/goose-vs-duck-meat
Goose Vs Duck Meat: What Tastes Better? | BestHuntingAdvice
Have you ever wondered what taste better between goose and duck meet? You don’t have to anymore. This article will elaborate on the key differences and similarities.
https://besthuntingadvice.com/goose-vs-duck-meat
In response Mark Knight to his Publication
Duck is very gamy tasting. Strong flavor. I don’t like it. My dad used to hunt them and then make “steak” tips with the meat. It’s more like beef, dark meat.