Two Rat/Taurus together is a 95-100% mirror, two unshakably loyal strategists who can see through almost anyone like cellophane, except, occasionally, each other. Both halves pair the Bull's rock-solid calm with the Rat's restless intellect, so the household runs on patience and quiet cunning in equal measure. The match is steady and deep. The danger is that two people this guarded can keep the playful side locked away for years.
Chemistry is slow to surface and worth the wait. Both Rat/Taurus halves keep a stuffy outer shell of acquaintances and let almost no one past it, so when two of you finally open the inner circle to each other, the playful side comes out at last. The bedroom is warm and unhurried. The risk is that neither of you ever quite gives the all-clear, and the wall stays up out of pure habit.
Talk is dutiful, honest, and a little formal. Both halves know exactly when to say thank you and mean it, which keeps things courteous, but courtesy is not the same as candor. Two people who guard their real thoughts behind good manners can leave a great deal politely unspoken.
Friction comes from inertia, the very thing the canon told both of you to watch. Two Rat/Taurus dug into a comfortable rut will defend it to the last, and neither wants to be the one to break the routine. Stress builds quietly while you both wait for the other to move first.
What each Rat/Taurus needs from the other is a nudge out of the rut. The canon warned you about inertia, so make a standing rule that one new thing gets tried each month, on purpose. Once you both treat the comfort zone as a base camp rather than a cage, the loyalty you already share turns into a life you actually go out and live.
At 95-100%, this is one of the most faithful and clear-eyed pairings the formula scores. Two Rat/Taurus build something that lasts. Just make sure you keep surprising each other, or the loyalty hardens into routine.