Are AutoCAD 2016 and AutoCAD 2017 effectively the same?
Are the features of AutoCAD 2016 and AutoCAD 2017 the same?
What differences are there between the two versions?
AutoDesk do have a comparison page at https://www.autodesk.com/products/autocad/compare-releases
It seems to be structured to show the difference between whatever the current release is vs. older supported releases.
The above page currently compares versions back to AutoCAD 2016.
Generally, these two releases aren’t too different. From my own experience using AutoCAD these past years, the biggest leap recently was 2015 to 2016 just in terms of UI. In general though, nothing too big recently.