Seams under the chamois!

I just realized that some of my cheaper bibs have a fairly substantial seam right across the middle of the chamois that my more expensive ones do not.

Has anyone ever noticed a difference between bibs that have this theme?

You can totally feel the seam with your finger through the chamois (at least now, when the chamois have lost much of their density).

I almost wonder if this wasn’t part of what was giving me such horrible sores on my ISM saddle.

On another note, what exactly is a seamless chamois? I don’t think I’ve ever seen a chamois with seams except for the stitching.