The Madone also has old outgoing 4600 Tiagra which will be obsolete in a month or so when 4700 bikes start hitting the street. As someone who has had 10 speed 105 and Ultegra and currently has 11 speed 105 I will say it's night and day difference. Last gen Shimano is serviceable but has a lot of issues. Current gen ergonomics and shifting are much better and make riding a much more enjoyable experience. And on the point of resale, value of a 4600 bike will take a hit when 4700 is out.