Have to say, I think we're a much better matchup against Brooklyn than Philly is. They really only have Thybulle to make it tough on Irving and Durant, yet he's kind of a bad size for either of them, being too slow to guard Kyrie and too small to guard Durant. Other than that, they're guarding their stars with average to below average defenders.
The C's, on the other hand, have a half dozen excellent defenders in Smart, White, Brown, Tatum, Al, and Timelord that are capable of switching on and off of Irving and Durant. And that's on top of an even stauncher team defense.