For the background, see, for example, this: Reused Voice Lines in Imported Battlegrounds Hero Skins - #6 by SparkyElf-2852 etc.
Now it would appear the aforementioned site no longer uses its own unofficiall classification, as per the title:
https://www.hearthstonetopdecks.com/shop-update-august-19-2025 .
Well, such terminology unification seems convenient to me.