When exporting a tutorial for rigid body physics, I noticed a lot of little white animated specks.
Cycles
1920 x 1080 30 FPS
GPU render using GTX 570
Samples 200
100% scale for render
PNG RGB format
124 frames
When viewed at 1080P Full frame specks can be seen and paused over wood platform area. http://www.youtube.com/watch?v=UCgzL52wKeA&feature=youtu.be
I do all my compositiing in AE. I just export the Cycles animation out as a PNG animation sequence. Havebt seen either of the options you mention in the animation portion of Blender.