Well ok I can get that point not being into visual novels I can get. The whole high school students thing making it like persona though? No just no. You might as well say Mana khemia or Valkyria chronicles 2 are persona clones if that's true.
What the hell is a Mana Khemia?
Anyway, the comparison are apt enough -- The fact that it's released in the midst of the Persona series sudden boost in popularity sort of shells it out as a game that wants a slice of the same cake. Valkyria Chronicles 2 isn't a good game btw.
The fact that they are solving a murder mystery, while they are in a cosmic netherrealm, or the fact that this layout below here:

Looks extremely simillar to Persona's layout only further strengthens the obvious comparison.
I don't care for playing a game that can't stand on its own without the need of having to play on the success of others, without
feeling like it's taking the concept further to make it its own. Much like how sequels have to function. A good sequel leaps off from the original, taking the things it did well from the first one and builds upon that, while a bad sequel spends most of its time wallowing in its predecessors success.