I'm from the UK where we use a different rating system: What age is a T rating for? The reason I ask is because Kingdom Hearts games are often rated 12+ here, which would be close to a lower teen, but there's no way they'd ever be rated 15+ or 18+, which would be an older teen or adult only.
Then again, PEGI clearly have different priorities to ESRB in regards to what constitutes a certain rating, so I don't know if they'd be comparable.