It's a good question, and at one level there are similarities, but really they are completely different fish kettles. IB is essentially a very large box, so there is no interaction between the front and rear waves, and thus no cancellation at low frequencies, but also no side nulls which can (can, not necessarily, IMO/E) help reduce room interaction. As Mark says, IB is limited in frequency due to the structure.
I think there are probably two common elements, one being (perhaps) lack of "box coloration" as mentioned by the OP. although I could see some care would be needed to avoid issues related to vibration/pressurization with an IB, and the minimal air loading of the driver resulting in a "desirable" Qts of around 0.7 (or higher or lower depending on who you ask).
That's my 2c on an interesting question