The "ASUS ROG Falchion Ace (Eng. Int., Cable)" with the manufacturer product ID "90MP0346-BKSA10" is not the ASUS ROG Falchion Ace HFX. Here are the key differences:

- The ROG Falchion Ace uses ROG NX mechanical switches, whereas the ROG Falchion Ace HFX uses ROG HFX Magnetic Switches with a customizable actuation range.
- The ROG Falchion Ace HFX features an 8000 Hz polling rate, Rapid Trigger toggle, and Speed Tap Mode, which are not mentioned in the specifications of the standard ROG Falchion Ace.
- The standard ROG Falchion Ace has sound-dampening foam, PBT doubleshot keycaps, and dual Type-C ports, but it does not include the advanced features like five-layer dampening and a silicone gasket mount found in the HFX model.

Therefore, the product you are referring to is the standard ASUS ROG Falchion Ace, not the HFX version.