Cloth. Like it and drive it everday. Feels softer and more comfortable to me. Harder to keep clean and will stain.
Leather. Looks more classy. Easy to clean. New GM leather is thicker and stronger than in years past, so it will last longer. Look at how long leather lasts on all those cows standing in the pasture out in the sun, rain, mud etc. They look pretty comfortable in it too!
My 2cents.
2SS/RS ordered.