They're both pretty poor, defensively.
I'm not sure what you're watching, but Atlanta's infield defense is miserable. Chipper is old and a basically immobile. Did you see him waving at that ball down the line, he wasn't anywhere close and it's been that way all year. Then he comes crashing in on Suzuki's play, kicks the ball and doesn't cover third? That's a little league mistake. Janish is fine, but Uggla is awful and Freeman's only advantage is that he's tall, good thing too, because the throws he's receiving are all over the place.
Atlanta's OF defense is excellent, but their infield defense leaves a LOT to be desired