ADD, Asperger's Syndrome, or both?

Recently my husband (who has diagnosed ADD and is on Strattera)  and I have been seeing a marriage counselor for over a year who specializes in Autism Spectrum Disorders (ASD), whom I engaged because we needed someone who could explain emotions without using emotions words (which he doesn't understand) and she said she could.  She's suggesting my husband has features of Asperger's (AS) - not being able to connect emotionally, not able to validate emotions, not reading non-verbal signals, and other symptoms. I realize that because she works with ASD, she is attuned to AS symptoms, but I'm wondering if ADD can look like AS - it's very confusing to sort out.  I know the only way to diagnose it to psychological testing, but he did this not that long ago for his ADD diagnosis (5 years ago at age 53).  I'd like to hear from anyone else who has this dual-diagnosis in their household.  After 30 years of marriage, with 20 of them focused on improving the marriage, I am only now getting a handle on what the real problems.  I'm on the brink of divorce, but working to create a good co-parenting relationship moving forward.  Four grown children, youngest 18.  Would love to hear how others have handled similar situation.  Thanks, Emme