| Basic Info | 
| Wear Type | Chest Strap | Wristband |  | 
| Price |  |  |  | 
| Ratings |  |  |  | 
| Activity & Fitness | 
| Activity | Yes | Yes | Both track daily activity | 
| Calories | No | Yes | Sigma Sport PC 9 Woman tracks your calories burned | 
| Sleep | No | No | Both don't have sleep tracking | 
| Heart Rate / Pulse | Yes | Yes | Both measure heart rate | 
| Distance | No | No | Both don't have stride length tracking | 
| Steps | No | No | Both don't count your steps | 
| Stairs / Floors | No | No | Both don't have elevation feature | 
| Exercise Tagging | No | No | Both don't have exercise tagging | 
| Smart Coach | No | No | Both don't have coaching feature | 
| Goal Setting | No | No | Both don't have goal setting | 
| Inactivity Alert | No | No | Both don't have inactivity alerts | 
| Additional Features | 
| GPS | No | No | Both don't have built-in GPS support | 
| Compass | No | No | Both don't have a compass | 
| Watch / Clock | No | Yes | Only Sigma Sport PC 9 Woman has a watch | 
| Alarm Clock | No | No | Both don't have alarm clock | 
| Reminders | No | No | Both don't have reminder | 
| Stopwatch | No | Yes | Sigma Sport PC 9 Woman has a stopwatch | 
| Music Playback | n/a | n/a | Both don't have music playback | 
| Reports | Activity | Activity |  | 
| Smartphone Remote Features | 
| Notifications | No | No | Both don't have phone notifications | 
| Caller ID | No | No | Both don't show caller ID notification | 
| Music Control | No | No | Both don't have phone music control | 
| Call Control | No | No | Both don't have call control | 
| Camera Control | No | No | Both don't have camera control | 
| Find Phone | No | No | Both don't have a find phone feature | 
| Battery | 
| Duration | 6 days | 365 days | Sigma Sport PC 9 Woman battery life is about 60.8 times  longer | 
| Battery Type | Replaceable Cell Battery | Replaceable Cell Battery |  | 
| Physical Specs | 
| Weather Resistance | Yes | Yes |  | 
| Waterproof | No | No |  | 
| IP Rating | n/a | n/a |  | 
| Weight | n/a | n/a |  | 
| User Interface | 
| Display | No | LCD Screen |  | 
| Display Size |  | n/a |  | 
| Screen Resolution |  | n/a |  | 
| Color Display | No | No |  | 
| Touch Screen | No | No |  | 
| Compatibility | 
| Android | Yes | No | Polar WearLink+ is compatibles with Android phones and tablets | 
| iOS | No | No | Both don't compatible iOS devices | 
| OS X/Mac | No | No | Both don't compatible MAC OS X devices | 
| Windows Phone | No | No | Both don't compatible with Windows Phone devices | 
| Windows | No | No | Both don't have a find phone feature | 
| Web Portal | No | No | Both don't have online web portal option | 
| Social Features | No | No | Both don't have social features | 
| Connectivity | 
| Bluetooth | Yes | No | Only Polar WearLink+ has a built-in Bluetooth connection option | 
| Wi-Fi | No | No | Both don't have Wi-Fi connection | 
| NFC | No | No | Both don't have NFC connectivity | 
| ANT+ | No | No | Both don't provide ANT+ wireless technology | 
|  | Buy on Amazon | Buy on Amazon |  |