Here are 3 interesting savant Syndrome differences from that of autism spectrum disorder. Savant syndrome is usually categorised as being an autism spectrum disorder, but it is however an independent diagnosis and it is possible to be diagnosed savant and also autistic. Here are three really interesting differences between the two conditions to show the difference. 1.Savant Syndrome Is Rare: Savant syndrome is an extremely rare condition in fact it is so rare that there are fewer than 50 savants