This series simply comes down to GS non-stars are better than the Cavs non-stars. Durant, Curry, and Thompson = Lebron, Irving and Love. I like the way GS plays more, with less isolation, but those 3 on each team are pretty much equal.
But Green (a star, but their 4th best player IMO), Iguodola (a former star), Livingston, Barnes, West (a really good scorer) ... they are all better than the complimentary players of Thompson, Shumpert, Smith, Korver on the Cavs.
The Cavs simply don't have the depth GS does. Nor IMO the coaching (or maybe the stars that listen to the coaching).