http://stats-for-the-nba.appspot.com/ratings/2014.html
http://stats-for-the-nba.appspot.com...RAPM_2015.html
Durant
+0.3 Defensively in 2014
+0.9 Defensively in 2015
"Damn good defender"
Curry
+0.7 Defensively in 2014
+0.8 Defensively in 2015
So according to the defensive metrics, Curry and Durant have the exact same impact on the ball defensively. Like I said before if your point guard is giving you this type of defensive impact that is fine, if your SMALL FORWARD is giving you this type of defensive impact then you are in trouble defensively. It's better to have an offensive stud in the back court and a defensive stud on the wing. It's just a better way to build a team. It's the reason why GS has Elite Offense AND Elite Defense.
You are going to be better defensively with Steph Curry at the point and a defensive minded Small Forward compared to if you had Durant at SF with a defensive minded point guard. Not to mention Steph Curry's team is going to be better at offense too. If you aren't bringing studly defense at the wing then you are hurting your team. Good defenses need elite wing defenders.
Hold the L my friend. Hold it graciously.