No, duals don't often share the same interests. Activities and conflictors most often share similar interests as well as benefit relations. This is why, when counseling people in helping them find their match, I tell them not to make interests a priority for looking to be with someone or meeting the right person. I have met a few dual pairs who took the same classes in college, but that's not "interest"; I would call that a study. Usually, extraverts are more objective, outside oriented with activity, or pull to do activities; an example, some SEE will volunteer but garden at home, while ILI will take gardening as a hobby, but hardly go out to volunteer....there they missed each other even though they like the same thing, one does the activity in private the other more of an external thing.
When looking for a dual don't look to meet them at your hobby, unless you take your hobby and incorporate it in a different sphere of life. For example. I love to hike, but being a low willed person and naturally having low energy, I rarely go hiking at a time where I can meet a dual. An added disadvantage to me is that when my duals go hiking, they focus on that singular activity, being naturally extraverted and one tracked kinda thinkers; so, the chances of me getting a dual to talk to me in one of their activities is rare if not impossible. The best way for me to meet and marry a dual is to be set up on a date, where the activity is a date, hence a singular activity concentrating on one thing. Exhausting