The Digico uses one preamp, controlable by any desk, with level matching.
What many people don't consider is the fact that the mic preamp is one of the most important links in your signal chain.
The 8-channel Octane preamp is specifically designed to enhance the front end of any multitrack digital recording system.
However, with a good preamp ahead of it all, this effect should be minimal.
Even if they do, a separate phono preamp can often help you achieve higher fidelity replay from your vinyl.