| Price | $349 | $249 |
| Product Announcement Date | May 11th, 2016 | Oct 1st, 2014 |
| Actual Availability/Shipping Date | May 11th, 2016 | Early Oct 2014 |
| GPS Recording Functionality | Yes | Yes |
| Data Transfer | USB/Bluetooth Smart | USB/Bluetooth Smart/WiFi |
| Waterproofing | Yes - 50m | Yes - 50m |
| Battery Life (GPS) | 14 hours in GPS-on | UP TO 40HRS IN GPS |
| Recording Interval | 1S OR SMART | 1s or Smart |
| Alerts | Vibrate/Sound/Visual | Vibrate/Sound/Visual |
| Ability to download custom apps to unit/device | Yes | Yes |
Music | Garmin Forerunner 735XT | Garmin Forerunner 920XT | | Can control phone music | Yes | No |
| Has offline music storage and playback | No | No |
Connectivity | Garmin Forerunner 735XT | Garmin Forerunner 920XT | | Bluetooth Smart to Phone Uploading | Yes | Yes |
| Phone Notifications to unit (i.e. texts/calls/etc...) | YEs | Yes |
| Live Tracking (streaming location to website) | Yes | Yes |
| Emergency/SOS Message Notification (from watch to contacts) | No | No |
| Built-in cellular chip (no phone required) | No | No |
Cycling | Garmin Forerunner 735XT | Garmin Forerunner 920XT | | Designed for cycling | Yes | Yes |
| Power Meter Capable | Yes | Yes |
| Power Meter Configuration/Calibration Options | YEs | Yes |
| Power Meter TSS/NP/IF | Yes | Yes |
| Speed/Cadence Sensor Capable | Yes | Yes |
| Strava segments live on device | Yes | No |
| Crash detection | No | |
Running | Garmin Forerunner 735XT | Garmin Forerunner 920XT | | Designed for running | Yes | Yes |
| Footpod Capable (For treadmills) | Yes | Yes |
| Running Dynamics (vertical oscillation, ground contact time, etc...) | YEs | With HRM-TRI or HRM-RUN |
| VO2Max Estimation | Yes | Yes |
| Race Predictor | YEs | Yes |
| Recovery Advisor | Yes | Yes |
| Run/Walk Mode | YEs | Yes |
Swimming | Garmin Forerunner 735XT | Garmin Forerunner 920XT | | Designed for swimming | Yes | Yes |
| Openwater swimming mode | Yes | Yes |
| Lap/Indoor Distance Tracking | Yes | Yes |
| Record HR underwater | WITH HRM-TRI/HRM-SWIM | With HRM-TRI/HRM-SWIM |
| Openwater Metrics (Stroke/etc.) | Yes | Yes |
| Indoor Metrics (Stroke/etc.) | Yes | Yes |
| Indoor Drill Mode | Yes | Yes |
| Indoor auto-pause feature | No | No |
| Change pool size | Yes | Yes |
| Indoor Min/Max Pool Lengths | 17M/18Y TO 150Y/M | 17M/18Y TO 150Y/M |
| Ability to customize data fields | Yes | Yes |
| Captures per length data - indoors | YEs | Yes |
| Indoor Alerts | Yes | Yes |
Triathlon | Garmin Forerunner 735XT | Garmin Forerunner 920XT | | Designed for triathlon | Yes | Yes |
| Multisport mode | Yes | Yes |
Workouts | Garmin Forerunner 735XT | Garmin Forerunner 920XT | | Create/Follow custom workouts | Yes | Yes |
| On-unit interval Feature | Yes | Yes |
| Training Calendar Functionality | Yes | Yes |
Functions | Garmin Forerunner 735XT | Garmin Forerunner 920XT | | Auto Start/Stop | YEs | Yes |
| Virtual Partner Feature | Yes | Yes |
| Virtual Racer Feature | Yes | Yes |
| Records PR's - Personal Records (diff than history) | Yes | Yes |
| Tidal Tables (Tide Information) | No | No |
| Weather Display (live data) | Yes | Yes |
Navigate | Garmin Forerunner 735XT | Garmin Forerunner 920XT | | Follow GPS Track (Courses/Waypoints) | Yes | Yes |
| Markers/Waypoint Direction | Saved locations only | Yes |
| Offline Maps | No | No |
| Back to start | Yes | Yes |
| Impromptu Round Trip Route Creation | No | No |
| Download courses/routes from phone to unit | Yes | Yes |
Sensors | Garmin Forerunner 735XT | Garmin Forerunner 920XT | | Altimeter Type | GPS | Barometric |
| Compass Type | GPS | Magnetic |
| Optical Heart Rate Sensor internally | Yes | No |
| Heart Rate Strap Compatible | Yes | Yes |
| ANT+ Heart Rate Strap Capable | Yes | Yes |
| ANT+ Speed/Cadence Capable | Yes | Yes |
| ANT+ Footpod Capable | Yes | Yes |
| ANT+ Power Meter Capable | Yes | Yes |
| ANT+ Lighting Control | Yes | No |
| ANT+ Bike Radar Integration | Yes | No |
| ANT+ Trainer Control (FE-C) | No | No |
| ANT+ Remote Control | No | No (can control VIRB though) |
| ANT+ eBike Compatibility | No | No |
| ANT+ Gear Shifting (i.e. SRAM ETAP) | | No |
| Shimano Di2 Shifting | Yes | Yes |
| Bluetooth Smart HR Strap Capable | No | No |
| Bluetooth Smart Speed/Cadence Capable | NO | No |
| Bluetooth Smart Footpod Capable | nO | No |
| Bluetooth Smart Power Meter Capable | nO | No |
| Temp Recording (internal sensor) | No | No |
| Temp Recording (external sensor) | Yes | No |
Software | Garmin Forerunner 735XT | Garmin Forerunner 920XT | | Desktop Application | Garmin Express | Garmin Express |
| Web Application | Garmin Connect | Garmin Connect |
| Phone App | iOS/Android/Windows Phone | iOS/Android/Windows Phone |
| Ability to Export Settings | No | No |
Purchase | Garmin Forerunner 735XT | Garmin Forerunner 920XT | | Amazon | Link | Link |
| REI | Link | |
DCRainmaker | Garmin Forerunner 735XT | Garmin Forerunner 920XT | | Review Link | Link | Link |