Done pretty well, most if not all the defensive errors came from the flanks so you can't really complain about the two in the middle. Confident in his and Alves' partnership this season.
Yes, because Ronaldo was playing in a much more competitive league for those three extra seasons. It doesn't matter anyway because at the end of the day Ronaldo has won more both individually and in a (inferior) team at the age of 25. Similar goal scoring and assisting stats don't equal world player of the year etc etc.