Did you see the colours i listed that could be possible dupes? Tho i haven't seen the quad in person, based on the photos that haven't been filtered, there are permanent colours that i think could be dupes.
Don't stress yourself. I'm still fighting the urge not to buy the TT quad, even tho i have 3 of the 4 colours. My struggle is that the ones i do have aren't all together in the same quad, which is why i want that quad! But i must stand firm and not buy it!