Couples Counselor and Coach - Should they be two different people?

I am very fortunate to live in a city where there are two ADHD-focused counselors who do both ADHD coaching and couples therapy around ADHD. I know that for traditional therapy, your personal therapist should be separate from your marriage counselor. Do you think that goes for ADHD coaches too, or is coaching different enough from traditional therapy that it doesn't matter? I already have a mental health therapist that will remain separate from the coaching piece, so I don't anticipate my coach becoming my mental health therapist. I've never had a coach before and we've never done counseling geared specifically towards issues around my ADHD, so I'm not sure what to do.

Any insight/suggestions would be most appreciated! Thanks!