It's just a name though. Quantum effectively filled that role. I'm sure they'll have a "twist" in Spectre where its revealed that Quantum is SPECTRE or a sect of it, but I feel like that's just a lame way to shoehorn SPECTRE's name back in to play on nostalgia and provide even more fanservice.
This is no doubt what's gonna happen. I can imagine Quantum were a sub division of Spectre all along, which would suck.