well, this dev. has 2 other games, only one of which is completed. You can kind of see wat to expect, because they're basically the same thing with a different setting. This game is only on 0.6, so the development is really slow. I have downloaded it but not actually tried it yet. From wat I've seen about the other games, content wise, it doesn't look promising.
Edit: I gave it a spin. The scenes are decent, but all of them are just thrown in at the start for "content". It's a bit cartoonish, but animated and not any worse than others. After the inital scenes, there's not any action but plenty of dialogue, and there's a real effort at a story, and it is interesting, but it seems like it's supposed to become a long story, and this version ended pretty early in that story.
In relation to Kunoichi Trainer... 1. obviously a lot less stuff, 2. I like Luchetty's scenes more, but there are a lot less characters and interactions so far 3. it's not a sandbox atm, which is actually better, because Kunochi Trainer is just blind stumbling. There's a lot less busy work/useless grinding. In fact, there's no work at all, it's just redundant choices atm, 4. Kunoichi Trainer has more story and more relationships, but both are also at the beginning stage. Plot wise, it's too early to tell.