Does my daughter have autism or some other developmental delay? it's not the same, right?

Get evaluated: Autism often has developmental delay, either social, motor or language. I obviously do not know your daughter, so they need an evaluation to see what the various issues may be.

Autism is specific: Autism(a) is a label used for a specific set of features & is like diagnosing appendicitis. It is specific. Autism is sometimes uses in a broader sense as ASD -autistic spectrum disorder, which includes autism, aspergers & pervasive developmental delay- not otherwise specified. This lumping together of different problems is sort of like having appendicitis spectrum disorder -belly pain.

Autism is different.: Autism is characterized by difficulties interacting with others, abnormal communication skills, and restricted repetitive and stereotyped behaviors. Depending on how severe the autism is, someone could also have mental retardation as well. There are many different types of developmental delays.