You can't tell anything about quality from photos. Additionally, these are swatches. Swatches are taken from the margins of a hide...the best leather--the leather a maker would use in a pair of shoes--isn't going to get cut up for swatches.
IMO...personal preference... if a calf is to be used as a reverse suede, it almost must be "struck through." That means that the dye penetrates uniformly from the grain surface to the flesh (or vice-versa). Most leathers that are intended to be used grainside out are not struck through. That means that the dye is pretty superficial (little penetration) on the flesh (suede) side. A little brushing, with a suede brush, will often expose the "chrome blue" of the core.