For Axiom 9 plus addition do I need an iTC-5, Seatalk ng adapter or both

[pilot1995]

I'm adding an Axiom 9 (replacing a Raymarine Dragonfly) and adding a Vesper Cortex. I believe I need an iTC-5 converter but do I also need a seatalk ng adapter?
Here is the current Raymarine Equipment I have using Seatalk 1 and Seatalk ng

Autopilot Control Head ST6001
SmartPilot Autopilot
i60 Wind Display,
ST60+ Tridata