Hmm I think they have a lot of potential. Maybe a good super-ego would be less exciting than a good dual, but I think the love could have a similar feeling of purity and affection. I think they both have something the other doesn’t. I imagine it would be easy to fall for a super-ego that wasn’t truly right for you..they might be more exciting as a first love than a husband/wife. I think if a super-ego pair are a truly good fit, they might not argue too much or have too many problems.
For some reason I think a dual might inspire me to be more ambitious than a super-ego..
Thinking out loud..If I had a job the perfect job already, maybe a dual wouldn’t have the edge over a super-ego so much.