4K multiplies windows; 21:9 widens one client
The M32U's 4K grid is a multi-client reference
At 3840×2160, the M32U divides into four 1920×1080 regions. This gives OSRS or Albion players a layout reference for several visible inventories and views. It does not guarantee the whole client interface will fit: window borders, Windows scaling, chat panes, and each game’s minimum window size still matter.
For OSRS, check RuneLite’s UI scaling and window layout in each client before treating one quadrant as usable space. For Albion, confirm the menus and combat view remain legible at the chosen scale. The multi-client monitor layout guide compares the same 4K and ultrawide tradeoff.
The LG gives one raid client a wider frame
The LG’s 3440×1440, 21:9 format gives one WoW or FFXIV client room for a central game view and peripheral panels. Two 1720×1440 windows fit side by side, while a four-client 2×2 layout would leave much narrower regions than the M32U. LG lists a 3800R curve, KVM, and 90W USB-C delivery, which may suit a work laptop and a gaming PC sharing one monitor.
The practical limit is the 60Hz maximum. If you want a higher-refresh single-client display, the Alienware and ASUS ultrawide comparison covers the panel and refresh tradeoff, including the ASUS at 180Hz over DisplayPort.
Both have KVM, but only one supplies laptop-class power
Both displays include a KVM and USB-C. GIGABYTE’s M32U manual lists USB-C output modes up to 18W and advises a separate power source for devices that need more. LG specifies 90W USB-C delivery. That gap matters when the monitor is the shared screen for a work laptop: the KVM can switch connected keyboard and mouse, but it does not raise the M32U’s charging output.
Confirm the connection diagram for both host computers before you rely on KVM. On either model, the USB connection for keyboard and mouse must reach the relevant host, and display inputs must match the cables in use.