The companion software is the same unified package all other Logitech peripherals use. I still have it installed since I have been using the G502 for a while now, and once Hyperion Core was plugged in, the soft picked it right up. I checked it with the G710+ and the two devices got along perfectly, customizing the mouse via keyboard & the other way around. While Hyperion Fury doesn't have Surface Tuning in its list of customization options, it introduces the Fusion Engine Settings, which is where you can tweak the accelerometer inside.
Seven tabs are present on the right corner: Home (where you can toggle between on-board memory and PC), Profiles & Macros, Pointer Settings, Lighting Settings, Fusion Engine Settings, Software Settings (Firmware and notifications), and lastly Social Media (for that most important sharing you do).
Macro & Memory
G402 has only 8 buttons available, unlike Proteus Core that had 11. Instead of the 3-profile on-board memory, Hyperion Core can only save one profile, complete with pointer and key assignments.
Since this is a unified software, once you choose to save directly on PC, the package offers the possibility to choose, edit and create a plethora of profiles, bind them to specific games and applications, and to make things easy, Logitech also provides a lengthy library of available titles with pre-made apps.
The Pointer Settings is where you assign up to 5 DPI stages, ranging from 240 to 4k DPI in increments of 80DPI. Just like G502, the software doesn't allow for custom X & Y axis DPI tweaking.
Under DPI sensitivity levels, you'll also find the Report options, where you can choose between 125Hz, 250, 500 and 1000Hz report rate.
The added lighting tab contains options for the Logo the DPI lighting, as well as a sleep timer.
Fusion Engine Settings
Lastly we have the addition of the Fusion Engine Settings, which registers the max speed you move your mouse around, and presents afterwards. It also shows the difference between using and not using the Fusion Engine. The sensor will register up to 550 inches per second, which is more than double other rodents on the market feature, like SteelSeries Rival with 250Inches per Second, Mionix Naos 7000 215IPS, or Razer Deathadder's 200IPS tracking speed.
Because I do not know what exactly 550IPS means in actual numbers, I used the software to register my most insane flailing of the mouse yet, on a 40cm mouse-pad. The results? I got to 209IPS, which I guess is at the limit of them high-end traditional sensors. However, I really, really couldn't get it any higher than that, and I tried, oh I tried.
I imagine larger pad, maybe one of them desk-pads might mean higher IPS, but at this point, that's just speculation.