The full picture
Home office fit depends on how permanent the treadmill will be. If it lives under the standing desk all week, the A1 Pro's stability matters more than the C2's portability. If it needs to vanish for weekend use of the room, the C2 wins. The X21 is for offices where the treadmill is part of the room's design, not something hidden. The R1 Pro works but brings more treadmill identity than most home offices want. The X25 is generally too much machine unless the office is large.
The Paceora angle
Home office treadmills see daily use, which means daily control friction. Paceora eliminates the phone-app step that makes most WalkingPad owners slowly stop using the treadmill.