I heard a saying once, it went something like 'if your relationship isn't complicated, he isn't your soulmate.' I think soulmate love is earth-shattering, knees weak, butterflies in your stomach when you kiss kind of thing. But also it has a gentler side, of the two of you understanding each other without needing to talk about it. Its passionate but the type of passion they share isn't something that flares bright then burns out, it lasts forever. (Don't I sound like the worlds biggest romantic...lol..) Does everyone find their soulmate...no...but its nice to think there's a chance you will 🙂
I never looked for a similarity between the two relationships, but now that you mention it, you can see the slight similarities.