Yes. Green's been a significantly better defender this season. I know it's just a standard line from some folks that Green is overrated on ST, but that's not true at all. It's hard to understand just how much he does for a team on that end until you chart every possession.
Danny's part in the OKC series was the finest piece of defensive work I've ever seen. He didn't just hold Westbrook and Durant to lower PPPs than Kawhi. He held Jackson in check; he switched onto Ibaka. He pretty much single-handedly removed Fisher as a factor after the first half of Game One and Butler after the first half of Game Two. Say what you want about Kawhi's ability to guard 1-4, but Danny often has his assignments change several times in one series (the gap between subs/timeouts).
Also, Green is probably the only two-guard who's a legit rim-protector, meaning he weakside rotation has the defensive impact of a big man's. A madly underrated part of the Finals was how Green's rotations in the paint negated the Heat running with two shooting bigs.
In short, Green is like the defensive version of Matt Bonner: He's so good on that end that people don't even know how and just assume he's overrated.