Which is the Ultimate Wash? GW vs Army Painter vs Pro Acryl

For years, the most popular washes, aka talent in a bottle, have been the Games Workshop Citadel line of washes, especially Nuln Oil, Agrax Earthshade, and Reikland Fleshshade. Now that Pro Acryl has expanded their line to include three washes, and Army Painter already has their successful line of washes, which of these will be the best?
Special thanks to Mrs. Feldgrau for making this video possible through the gift of Christmas hobby supplies.