Tizen OS means it's no longer a Galaxy, but Samsung's Gear 2 offers many improvements over the original

Mobile World Congress

Samsung recently announced the first Tizen-powered wearable device, the Gear 2, moving away from the Android-based Galaxy Gear. But arguably the Gear 2's software is its least noticeable change — the UI is a dead ringer for Samsung's first wearable, and it functions just the same as that device. The larger changes come in the device's physical hardware, as you'll see in our quick comparison video. The Gear 2 is slimmer and lighter, with replaceable watch straps and a built-in heart rate monitor. And the movement of the camera, microphone and speakers onto the body of the watch allows the strap to be less bulky, too.

Check out the video above, and click past the break for a comparison of the Galaxy Gear and Gear 2's internal hardware.

More: Hands-on with Samsung's Gear 2, Gear 2 Neo and Gear Fit smartwatches

  Samsung Gear 2 Samsung Galaxy Gear
Display 1.63” Super AMOLED (320 x 320) 1.63” Super AMOLED (320 x 320)
Dimensions Gear 2: 36.9 x 58.4x 10.0 mm, 68g;
Gear 2 Neo: 37.9 x 58.8 x 10.0mm, 55g
36.8 x 56.6 x 11.1mm, 73.8g
Processor 1.0GHz dual-core processor 800MHz dual-core processor
Memory 512MB + 4GB storage 512MB + 4GB storage
Battery 300mAh internal;
Typical Usage 2~3 days, Low Usage up to 6 days
315mAh internal;
Up to 25 hours typical usage, 150 hours standby
Connectivity Bluetooth 4.0, IR Bluetooth 4.0
Water resistance Rated IP67 (one meter for 30 minutes) Rated IP55 ("Splashproof")
Camera Gear 2: 2MP;
Gear 2 Neo: No camera
2MP
Software Tizen Android 4.2.2
Sensors Accelerometer, Gyroscope, Heart Rate Accelerometer, Gyroscope
Colors Gear 2: Charcoal Black, Gold Brown and Wild Orange;
Gear 2 Neo: Charcoal Black, Mocha Grey and Wild Orange
Jet Black, Mocha Gray, Wild Orange, Oatmeal Beige, Rose Gold, and Lime Green