This reminds me of how it's been pointed out that the Defiant set used in ENT - "In a Mirror, Darkly" has some minor cosmetic differences with the appearance of the Defiant in TOS - "The Tholian Web". Given that the interphasic rift could have theoretically connected more than just 2 quantum realities, it could be possible that more than 1 Defiant went through the rift. We could use this to justify having both ENT - "In a Mirror, Darkly" and SCE - Interphase in the novelverse. But I doubt the TV and movie producers would ever overtly use this. Cause then there would be no novelty in using the long-known by the audience Defiant as a plot point in ENT.
And also the
Defiant as seen in "Raise the
Defiant," from DC Comics Vol. 2, Special #2 (from Winter, 1994) set during the movie era, when the
Enterprise-A rescues the starship from the interphase tear around 2288 or thereabouts.
It's entirely possible that this was yet another quantum replica of the
Defiant, with one version emerging in 2155 (as seen on ENT), the NCC-1701-A rescuing another version of the ship in 2288, and the USS
da Vinci encountering still a third replica in 2376 (there's also mention in
The Lost Era: The Sundered of one being spotted by the
Excelsior in 2298, from what I remember, which could've ended up later being the SCE-duplicate).
The
Defiant getting pulled into the rift could've produced a potentially-infinite number of quantum duplicates, which then keep reemerging periodically from the rift throughout history.