Asperger. Main features are qualitative impairment in social interactions with lack of empathy, stereotyped restricted patterns of behaviors/activities/interests, no delay in cognitive development or language. Other associated features can include intense preoccupation with a narrow subject, clumsiness & restricted use of words.
Socially awkward. These toddlers to varying degrees have awkwardness socializing with other children and adults. They may prefer solitary play, be interested n objects as much as people, become overwhelmed in busy environments, need time to adjust to changes in routine, and may talk less than peers and in a monotone.