I’ve been told that duplicating is better than bringing multiples of the same object from the content browser. Apparently, duplicating is better on memory as Unreal looks at the first object only and the other objects act as an instance.

Is this correct?

If you have an object in the content browser you can use as many copies of that as you want and it will only load it into memory once. It doesn’t matter if you drop it in from the content browser or if you copy an object that’s already in your map it will still reference the object in the content browser.

Great, thanks