I don't disagree with you, I was generalising 😂.
Of course both lines I think are very good solid products. I find the base prices are often similar but once the packages are added (and Celebrity gratuity etc), it just seems to come out more costly to sail X than Princess.
I also quite enjoy the Princess 'quirks' (Love Boat, gameshows etc). I personally find the two lines very similar.
That said, I'd love to try the retreat or new Sun suite... Maybe one day!