I think its a decent possibility the artist for the game is the same, but I doubt its 1 to 1 the same team, or developers making this game as Eclipse Work's titles. Doubt they'd be shutting down communications between themselves and the community for that reason either even if they were the same exact set of people who made Ariadne/Magica, probably more so just a professional approach to how they handle feedback and communicate with us all, given the way they've planned out hte trial, the survey, even discussing the survey results and all as well, let alone how they've ramped up previews of the game in time leading up to the release, rather than just stringing along bit by bit as some devs do over years as soon as they have things to share, useful and intriguing or not.
If it is just the same Circle under a different name, I'd just be curious as to why they went under, then came back as another name, but I don't think its worth speculating too much on. Fun to guess if nothing else I suppose.