What is the difference between regressive Lafora disease, CDD, and regressive ASD?

[SwedeedeeConan99]

I see two conditions that are similar to Childhood Disintegrative Disorder, one is regressive Autism (spectrum Disorder), which I had when I was 18 months and had a completly normal development before the regression, the case would also be the same with Owen Suskind, when he too had a normal deovelopment before he regressed at age 3. So at the initial moment after the regression, Owen Suskind would have been diagnosed with CDD and so would if if the regression came 6 months later. Also I also read a rare neurodegenerative disease, Lafora diseases, shares some features and has many of the same symptons as CDD even tough Lafora has nothing with autism.
My question is, what is the difference between CDD and:
1) Regressive ASD
2) Lafora disease