Hi, Draclvr!
I'd never paid any attention to these standalone digital card games before I saw Legends. I've since seen articles comparing Legends to Hearthstone and to Gwent. I checked Gwent out today after reading your post. It looks interesting too.

I remember playing the in-game version in Witcher and enjoyed that.
I guess these games are similar to each other, but Legends is a little different from Gwent in style and play. In Legends, you're fighting enemies and a "boss enemy." The game has two battle lanes instead of one (as Hearthstone uses). Two lanes create additional layers of strategy. Gwent uses rows for different styles of battle, but Legends' lanes are open to any battle style, although these lane lines usually cannot be crossed except to attack the boss. Also, the lanes can have conditions placed on them, such as being shadowed. In shadow lanes, creatures are hidden for one turn and so cannot be attacked.
I think playing both Gwent and Legends would be fun. I'm an Elder Scrolls fan myself, having played Morrowind, Oblivion, and Skyrim. But I've only played the first Witcher game, so am not as familiar with that world's lore.
And on June 29, Legends will be releasing 154 new cards for gameplay, its first official expansion set: Heroes of Skyrim.
https://legends.bethesda.net/articles/indepth-look-heroes-of-skyrim?locale=enHere is a video showing the beginning tutorial play in Legends:
https://www.youtube.com/watch?v=5KW53xbHDVUAnd here is a video showing an introduction to Gwent for comparison:
https://www.youtube.com/watch?v=I5LBlpR2nVU