New comparisons - this time I set the image at 1920x840, refined a bit the script, and applied a preliminary color regrade.
Gkar Bicubic Vs MagicSR + BasiClean + GrainPlate:
http://screenshotcomparison.com/comparison/125542
http://screenshotcomparison.com/comparison/125545
http://screenshotcomparison.com/comparison/125548