Dart rear quarter style lines

Hi Guys,

With every Dart I come across, one of the first things I look at is how prominent/sharp/rounded the center style line is on the rear quarters.
I'm referring the the one that's about 8" from the top of the quarter.

It seems they always look a bit 'softer' and rounder than the same line on the door adjacent door.

Were they always like this from new?? Should they look the same as the lines on the door? Have they been lost under many layers of paint and repairs over the years?

Thanks for your thoughts!!