Yes, different plants - at least, different pots. All sitting together on a shelf. The third says "Bull's variety" or something like that - possibly an old clone? Isn't (Harrisianum the oldest paph hybrid?)
Yes, Harrisianum was the first registered Paph hybrid. The 3rd pic should read "Balls Variety" more correctly Harrisianum ' G S Ball '. It looks something like it but not quite right. The others look like the only other Harrisianum to be cultivated, not sure if it was ever given a variety name.