1. Display
Size: Vio Navi (3.5") > BSC500 (3.3") > Vio Navi Air (3.0")
Outdoor (bright daylight): Vio Navi = Vio Navi Air > BSC500
Indoor / Shade / Night: BSC500 > Vio Navi >= Vio Navi Air
Color representation (contrast): BSC500 > Vio Navi = Vio Navi Air
Power efficiency: Vio Navi = Vio Navi Air > BSC500
* Display size: If you subtract the radar display space from the Vio Navi and BSC500 screens, the ratio is similar to Vio Navi Air.
* If using a rear radar together, Vio Navi or BSC500 looks better. Air might feel too narrow.
* Due to display characteristics, Vio Navi and Vio Navi Air have lower contrast than BSC500 (with limited color representation and duller appearance).
* In the default (auto) brightness setting, Vio Navi Air is set slightly darker than Vio Navi.
* Vio Navi uses a Gothic style font, while Vio Navi Air and BSC500 use a new rounded style font (matters of preference).
* Overall, BSC500 has the best visibility, but in daylight it's slightly dim even at maximum brightness.
2. Touch Recognition Accuracy and Responsiveness
Vio Navi = Vio Navi Air > BSC500
* Air was initially worse than Vio Navi, but after the firmware update it's at a similar level.
* BSC500 was initially very poor, but improved after the firmware update. However, it's still slower and less accurate than Vio Navi.
3. Navigation
Basic functions: Vio Navi = Vio Navi Air = BSC500
Advanced features: Vio Navi = Vio Navi Air > BSC500
Voice guidance: BSC500 (built-in speaker or earphones) > Vio Navi = Vio Navi Air (earphones)
* Simply loading and using route files shows no significant difference.
* With the latest firmware, all three models have similar rerouting accuracy when deviating from the route using phone-synced navigation.
* There are some functional differences between BSC500 and the others in map and route display interface, simplified navigation, etc.
4. Features and Convenience
* Vio Navi and Vio Navi Air support more data and newer sensors than BSC500 (cycling dynamics, respiration, etc.).
* Vio Navi supports more features than Vio Navi Air, such as training and recovery.
* Vio Navi has i-Climb 3.0, BSC500 has i-Climb 2.0.
* BSC500 has inconveniences such as inability to configure data fields on the device itself and requiring use of the app.
* However, BSC500 has a built-in speaker and supports electronic bell (recommended to use with Di2 integration rather than touch).
* None support automatic waypoints (manual creation via app required).
* None support Strava Live Segments (manual creation and activity recording via app required).
Personally, I use BSC500 when riding at night or on busy bicycle paths, and Vio Navi for training and competitions.
