Let my clarify.
With the 1DX, if you select the AF points to be red, they'll be black while the camera searches for something to focus on, briefly flash in red when focus is acquired, then remain black until the camera times out.
With the 1DX Mark II; they'll be red when the camera searches for something to focus on, briefly flash brighter red when focus is acquired and then remain red for the rest of the time.
The 1DX behaves the same as the 7D whilst in One Shot AF. In Servo AF, the 1DX can aid in making the AF points visible in low light, by flashing them in red occasionally. In the 7D, they remain black. They were identical to begin with, though. The Servo AF illumination in the 1DX was added as a firmware update, on popular demand.
Now I don't know how the 7D Mark II works, as I don't have any, but if you can set them to be red, it's not the same as the 1DX Mark II, as that camera will never let them be anything but illuminated in red. The on/off/auto setting in the 1DX is replaced by a bright/brighter setting in the successor. There's no off.
EDIT: I got curious and checked in a user's manual for the 7D Mark II.
- The AF Point illumination in the 7D works as with the original firmware for the 1DX.
- The AF Point illumination in the 7D Mark II works as with the last firmware for the 1DX.
- None of the two behaves like the 1DX Mark II.
Now I sincerely hope I've been able to re-instate Ah-keong's desire for new gear!





