Yes, if both truly love the Church in all her diversity and are willing to compromise in the "style" of practice. Communication and compromise, right? I know for myself, I would prefer to practice in the Byzantine rite, yet it is not available where I now live. I attend both the Novus Ordo- Latin and English- and the Tridentine Latin Mass. Personally, I feel that one, can at times, not seem as reverent and the other I feel like I am not very involved. (I like to sing!) The Byzantine rite seems, to me, to be a beautiful and rich blend and balance.
I think it depends on each persons ability to respect their partners views and accept their partners preferences without trying to change them to agree with their own, and each partners willingness to compromise. It's pretty much the same as every difference of opinion they will face.
I doubt it. The Trad is probably incapable of the teeniest tiniest compromise. The non-Trad would be brow-beaten either into submission or into a nuthouse.