The mirror triggers feel different with a true twin. My karmic ex and I activated each other constantly, but it felt watered down compared to what happens now - the telepathy, the soul channeling. You won’t really get it until you’re in that space, watching someone reflect your exact wounds back at you in ways no one could have predicted.
Karmics will trigger you, but they won’t help you actually do any kind of inner work or healing. They’ll just leave you broken and smashed on the floor.