Two Ox/Capricorn together is a 95-100% mirror, two relentless finishers who will take any project all the way to its conclusion, sometimes well past the point where it should have stopped. Both halves share that famous stick-to-itiveness and a gourmet's taste for the finer kind of junk food. The match is rich and durable. The danger is that two people who never admit they are wrong cannot easily fix a course that has gone off the rails.
Chemistry is comfortable, indulgent, and built to last. Both Ox/Capricorn halves love the good life and will happily share a double portion of baked Alaska while the world frets about its waistline. The bedroom is unhurried and well appointed. The risk is that two such fixed personalities can settle into a luxurious routine and forget to keep wooing each other.
Talk is confident, well-informed, and stubbornly certain. Both halves are repositories of received knowledge, which makes for a great trivia team and a terrible argument, because neither of you will concede a point even when you are plainly wrong. Two of you can dig into opposite facts and stay there for days.
Friction comes from that refusal to admit error, the trait the canon named with affection and a warning. When two Ox/Capricorn each take a project, or a grudge, to its ultimate conclusion, the original point gets mangled along the way. Somebody has to be willing to say the goose was fine and stop dissecting it.
What each Ox/Capricorn needs from the other is permission to be wrong without losing face. Build a private rule that changing your mind counts as strength, not defeat. Once you both let that guard down, your shared persistence stops mangling good things and starts finishing them beautifully.
At 95-100%, this is one of the most solid and self-assured pairings the formula scores. Two Ox/Capricorn can build a kingdom of good taste. Just leave a door open for the words I was wrong.