I've had both and like both.
The mesh is my first choice- when they are new. Over time the fabric stretches and they become less supportive- slouchy. I bought a new cover for it when it was several years old, and of course the new one stretched over time as well. they come with adjustable lacing to tighten the fabric and it works about halfway well.
I had a high back tractor seat years ago and I also used a big PFD- America's Cup. The high seat back interfered with my humongo PFD so I couldn't lean back very far when really pulling on the oars. Without a big PFD, the high back tractor is really nice. Now I just use low back tractor seats, mainly because the are a good compromise and a few years ago I found a killer deal on Northern Tool on some close-out John Deere tractor seats in bright yellow (of course). I bought 4 of them at $12 each, I should have bought a dozen. With 3 yellow seats on my red boat, there is no mistaking me on the river.
Don't Wanna Die Askin' for Another Chance