Those Katzkins look nice. I had never heard of Clazzio covers prior to seeing them mentioned in this thread. They also look really nice. For me personally, it would be a tough choice between the two. Good luck to OP on making a decision.
Oddly enough, I had OEM leather in my previous RAM. It held up well and looked good, but the older I got the more I disliked my buns getting cold in winter. And I'm too poor to afford heated seats!
For my current RAM, I specifically chose cloth. I don't drive much and I'm usually the only person in my truck, so the cloth doesn't get dirty...and my buns don't get cold.
I grew up with two brothers who worked at their dad's upholstery shop. I've hung around their shop and seen how much work it is to install seat covers. Consequently, if I ever decide to install leather covers at some point in the future, I would pay for installation! I'm sure I could do it myself, but it looks to be a time-consuming pain, and I would probably always be critical of my work.