They match exactly, are made of very high quality material that will last forever, washable, and fit perfect to the seats.
Well, not quite forever. I put my dealer-supplied seat covers on at 15,000 miles to protect the leather. They work fine, but the driver's seat cover had a hole worn in the seat and the back by 70,000 miles. An upholstery shop wanted $25 to patch it. I took it to my cleaners and the lady there sewed a canvas patch on the back for $3. Should last a few more miles.
No, the dealer won't sell one seat cover -- I asked. Sets only. Geno's would be a better alternative.