My son has ADHD, and I too thought it might be Asperberger's. I was told some children with Autism have ADHD. After much research, I took him to get a full neurological evaluation and it was determined he did not have any form of autism. Just a language disorder. He has trouble expressing his thoughts. Speech therapy is helping him immensely with his communication.
Also, with ADHD, sometimes the child has trouble playing as they are not able to concentrate during play time and may forget rules of games kids are playing. Thus, they might be socially immature or back away from kids when they didn't hear the rules of a game or what they are playing.
There isn't much difference in AD/HD with ODD and mild Aspergers. Some in medical feild think they may be the same. Both have broad array of behaviors and symtems. Proffesionals can more easily pigionhole a kid into AD/HD than Aspergers. Our daughters evaluation could have gone either way. Scales for both are subjective. My son has ADHD but his psychiatrist thought it might also be Asperberger's in addition to the ADHD. We jumped through all of the hoops to have him tested and the test results could have gone either way. They weren't very concrete. With funding in our state for home therapy for Autism being so low the dr thought tha the one that did the test left it so vague because of funding issues. Needless to say it is still up in the air it may or may not be Asperberger's. We continue to treat the ADHD but not the Asperberger's.