P4 is much better in general, but it does have the same high-school-anime atmosphere and the honorifics in dialogue. I do think the characters are better-developed and more likeable, though (because P4 is more about them than P3 was). I'm not a big fan of P3's cast myself.
Also, I thought Yuka-tan was a deliberate pun.
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"As the size of an explosion increases, the number of social situations it is incapable of solving approaches zero." -Vaarsuvius, Order of the Stick