Yes. Solasta is a faithful implementation of the 5e mechanics, with races and classes copied directly and sub-classes being OC to a large degree. There may be some stuff missing though, at a glance BG3 is more comprehensive in how many spells, items are there. The entire setting is also an original thing, we’re NOT playing in Faerun there, the mosnters are different, the map is different, the lore is different and much smaller.

Compared to BG3 there’s a lot less stories in Solasta. I’ve won the main campaign and the first DLC while trying to find as many subquests as possible and I don’t think it would add up to 100 hours. But then there’s the second dlc (which adds levels 12-16) and a myriad of fan content, so sky is the limit. Most quests are excuses to go out there and clear a dungeon or a swamp. Main plots are fairly on the rails and not too deep. The first DLC tries to be a bit more of a sandbox but in my playthrough the ending had a glaring contradiction in it so you see it’s not too polished.

But boy, is the dungeon clearing pleasant. Solasta embraces the dungeon crawl and combat aspects of D&D - maps are very diverse, there’s a good balance in number of different enemies (enough to not be boring, but not too many to lose track of how to deal with anyone), very granular difficulty settings. And the UI.

Coming from Solasta I can say BG3 has missed the mark in converting 5e to a computer game. Solasta is much cleaner and more accessible (bigger icons, better controller integration, clear movement in combat), multiplayer is easier to start, but is fairly unstable once the game is going. It’s not a serious problem tho, desync doesn’t kick out anyone from the game (just now everyone plays single at their machines), I can save and re-start the multi session with a save from the moment the server failed.

So if you want the tactical d&d with smooth multiplayer Solasta is the best thing there is. If you care for stories and roleplaying… not so much.