No difference between the 13 and 15. Do not take delivery of any vehicle that does not perform to your standards. Tell the dealer it vibrates and make them fix it. Tell them you will stop by and test drive it again once they fix it. Don't fall for the "just sign here and we will fix it" ploy.
Modern cars are very finicky when it comes to balance issues. So, they need to make sure a car with only 14k miles rides like a brand new car.... if not... move on...
Remember, discontinued or not, the Crosstour has a very limited appeal. It is not like they have customers lined up to buy one. They may say they do, but they don't.....
2010 Honda Crosstour EX-L AWD
2015 Nissan Altima 2.5S
1985 Dodge 600ES Turbo Convertible (41k and holding)