All devices have identical internal gps/baro/battery PCB board. Airspeed version has additional airspeed and precision humidity/temperature sensors, with dedicated chamber and airflow canal on the back side of the enclosure for real time air properties measurements. Price difference is based mostly on built in ereader inside. Touch2 is cheapest option at this moment, but has older technology eink display.
IGC logger will be finished by end of this month and hopefully approved by CIVL. I started process of getting Position Recording level approval in January 2017. This means that V6 Basic will be logging flights independently on hardware level (from gps directly into SDcard) and on application level, by flying app (LK8000, XCsoar or Tophat).
|V6 Basic GLOHD||V6 Basic Touch2||V6 Basic Aura|
|Optional Airspeed measurement|
|Eink display technology||Carta||Pearl||Carta|
|Display resolution/DPI||1448 x 1072 / 300ppi||800 x 600 / 167ppi||1024 x 768 / 212ppi|
|Display reading quality|
|Display Backlight||only in ereader mode||only in ereader mode|
|External dimensions||156 x 115 x 19mm||156 x 115 x 19mm||155 x 111 x 17mm|
|Touch screen technology||Infrared sensing||Infrared sensing||Capacitive (requires special gloves or conductive stickers)|
|Bracket mounting screw||M4||M4||M4|
|Barometric sensor||100Hz/10cm resolution||100Hz/10cm resolution||100Hz/10cm resolution|
|Flight grade precision GPS/Glonass/Beidu module|
|SDcard backup logger|
|Gyro/Acc/Compass sensor fusion|