How to parent layers properly while using 3D tracker

Hi, I am new into 3d tracking, i am making a scene using 3d tracker using some yt tutorials.

Let's suppose there is a scene, used 3d tracker on it, selected some point and then used "create solid and camera" option. But the my doubt is some youtubers are copying the position property of that solid and are pasting it to the asset which we want in the scene while some are using parenting feature in which they link asset to the solid layer with a pick whip while pressing shift, so which one is better to get a smooth result, because when i use copy method i see that asset moves a little bit as camera moves in scene but sometimes it works same as the parenting method.