Indeed.
The writing in DanganRonpa feels more in line with Corpse Party and 999 to me so far. I think the Persona comparisons that people keep making are a bit off, in my opinion. People probably make them just because of the vibrant colour scheme (Which isn't really a Persona thing, but people think it is because of P4) and the fact that it's a group of high school students in a high school.
I appreciate Persona's writing for what it is. Like I say, it feels genuine.
Having recently listened extensively to the Japanese audio to Persona 3, especially through the drama CDs, I can kind of understand. The voice work and script are very different from say... a shounen style anime. They actually speak closer to how actual Japanese people speak. Less overacting, hamming it up, stiffing. Lots of mumbling, cutting of sentences, trailing, etc. It's a very natural feeling.
I think it plays a significant factor in why Persona 3 and Persona 4 have such good localizations too. When the actors can actually
perform instead of trying to imitate the original performance, it does wonders.
Wouldn't you just call that depth? Like each character has more depth than the average Japanese video game character? Seems like a better fit than genuine. Like all the other characters are fake or something.
No, there's a genuine difference in the writing styles. It is a bit more obvious if you have an understanding of Japanese, even a beginner's level like mine.
If you want to try and hear the difference, watch some footage of Persona 3 in Japanese. There are a lot of undubbed videos on YouTube to give you an idea.