First of all, they all differ in their coloration and variegation!
The White Wizard has green stems with a whiter variegation. It tends to grow faster than the other two. It is also distinguished by its white spots which tend to be larger than the others. On this plant, we will not find other colors than green and white. So, if you see pink color or brownish purple hues, it is another plant. Its leaves tend to be larger as well.Like the White Knight, it is a climber.
White Princess has narrower, longer leaves with green stems that can have a slight pink and white coloration. It is often the easiest to identify! Unlike White Wizard and White Knight, this plant does not climb! It is often this one which has more ''splashing'' effects at the level of the spots.
The White Knight has brown-dark purple stems and a rather variable panachure. It can sometimes have large white spots, but sometimes the spots have a "splash" effect.This will depend on the growing conditions and the environment in which the plant is found.This will depend on the growing conditions and the environment in which the plant is found. It has a more rounded leaf shape than White Princess and smaller leaves than White Wizard. This plant likes to climb.