What is the difference between angelman syndrome and autism?

Angelman Syndrome = : intellectual disability,puppet-like, jerky movements, hand-flapping, laughter outbursts, sociability, & severe language deficits from lack of maternal genes, 2 sets of paternal genes or only active paternal genes on Chromosome 15q11.2-q13. A few kids with AS lack social communication & reciprocity + their stereotypical movements, warranting additional diagnosis of Autistic Spectrum Disorder.