They're not the exact same stifling defense in some aspects, but in others they're even better than usual. Sure, they aren't getting as many turnovers, but they also have improved their pass defense on every level, now having the top unit in the NFL. That's something they really struggled in at times last year.
On a whole, they're giving up a total of 14 points a game (also 1st in the NFL)...that's absolutely insane, and another aspect of improvement from last yr.
With a very good rush defense, and a much improved pass defense they pose a real problem for Denver specifically (in my opinion). I'm not seeing anything close to an upset but you never know in the NFL.
I think they will still be a real pain in the ass for anyone who meets them, unfortunately.
That said, I also think that they have just as good as any other AFC team of losing too, however I don't think it will be to a team of 'lesser' talent like the Denver Broncos.