Piebald is white spotting, that blocks out the base colour, and makes a 2 coloured mouse. Like a black and white spotted one. 
Splashed, is a coloured mouse with dark coloured spots on top of the base colour. Usually, it is quite smudgey.
Variegated looks a lot like splashed, but it's colour on a white background. Sometimes, it can look a lot like piebald.
If you have a mouse that is piebald, and splashed, you get a tri colour!
These are all different genes.
Splashed, is a coloured mouse with dark coloured spots on top of the base colour. Usually, it is quite smudgey.
Variegated looks a lot like splashed, but it's colour on a white background. Sometimes, it can look a lot like piebald.
If you have a mouse that is piebald, and splashed, you get a tri colour!
These are all different genes.
