Hello, I'm hoping some people can give some feedback and personal preference. Currently I'm looking at a 2013 S8 with 33,000 miles on it. I'm comparing that Versus a 2013 S7 Prestige with 20,000 miles on it. The price difference is around $7000 more for the S8. Would appreciate any feedback or preference. I happen to like the body style of the S7, but trying to be rational with a larger back seat for the kiddos.