Spotty vs Dotty - What's the difference?

As adjectives the difference between spotty and dotty

is that spotty is having spots; spotted while dotty is having many dots.

is a common New Zealand fish, species: Notolabrus celidotus.

(er)

Having spots; spotted.

Of inconsistent quality

Many of the buyers had a spotty credit history.

(spotties)

A common New Zealand fish,

I went fishing today and all I caught were spotties .

* spottiness English slang

(er)

Having many dots.

I'm all for cheetahs, but why must they be so dotty ?

(British) Mildly insane or excessively preoccupied; often, senile.

My nan has got dottier and dottier since she's got to the age of eighty.

* dottily * dottiness