There are differences in jackets.
For example take something that should be near and dear to the heart of a Floridian. Rain jackets. Most cheap rain jackets are a waterproof plastic, you get clammy pretty quick. Mid-level jackets start to get into low end wickable fabrics, but they get soaked through easily. The upper end jackets include high quality wickable, and thicker better applied DWR coatings.
And that is not even talking about features, low end jackets sometimes don't have a flap to cover the zipper. Mid-level jackets may or may not have pit zips. And even among the higher end jackets there are feature differences.
I use a REI brand eVent jacket, I consider it among the lowest end of the upper end jackets. It is missing a number of features seen on the better jackets like the Dead Bird. But I decided the $200-300 savings was worth giving up those features.
If I purposely went out in the rain, I would probably get a set of Dead Bird rain jacket and pants. But since I don't I just use the REI brand rain jacket.