I’m a little blown away at the difference in quality between rendering with the GPU vs. CPU, with the CPU being drastically higher quality. Both took approximately the same time to render. I wasn’t expecting there to be any difference in quality—just speed of processing.
Conversion settings: Gaia-CG v5, scaling 640x480 to 1440x1080, saved as MP4. The single difference in render settings was GPU vs. CPU, with the CPU output on the left. Notice the jagged diagonal lines in the image on the right. GPU is AMD Radeon R9 M390 2GB.