Samsung Galaxy S5 and Sony Xperia Z2 are both premium smartphones that features fast processor cores, big RAM and outstanding camera. But how these smartphones makes sense if you already own Galaxy S4 and Xperia Z1?

Samsung Galaxy S5 Premiums

On a quick look, Galaxy S5 boasts 2.5 GHz quad-core processors, 2 GB of RAM, 16/32 GB internal storage with up to 128 GB of microSD card support and 16 MP rear camera shooter.

Reasons Why Upgrading to More Premium

1. More Battery Life
Galaxy S5 boasts a better battery pack than Galaxy S4. The new Samsung flagship carries 2800 mAh which 200 mAh higher than S4. In addition, a newer battery saving mode has been included called Ultra Power Saver which is more intelligent compared to the Galaxy S4's version.

2. Faster Internet Connection
Samsung included MIMO or multiple input, multiple output technology on the Wi-Fi and LTE radios of Galaxy S5. You can get twice as much speed using dual Wi-Fi antennas or combine Wi-Fi and LTE connections at the same time.

3. Anti-Hazard Protection
In order to save for buying additional accessories just to prevent dust and water damage, Galaxy S5 features both with IP 67 rating. It is dust proof and resists freshwater for 30 minutes under 1 metre of depth.

4. Camera Improvements
No matter what kind of software update Galaxy S4 may receive, the 16 MP with video stabiliser on Galaxy S5 remains as the best. Moreover, Galaxy S5 brings faster auto-focus, richer HDR, selective focus and 4K video recording.

5. S Health Upgrade
If you are using S4 for a healthy lifestyle, Galaxy S5 sports a built-in heart rate monitor in addition to a pedometer and fitness tracking features.

What Won't You Get
Galaxy S5 may be more premium than S4 but the upgrades are somewhat incremental for you won't get any of these rumoured features before it was released.

- Processor cores with 64-bit support

- 2K display resolution or 2560 x 1440

- Metallic exterior design

- Optical Image Stabilisation

Sony Xperia Z2 Premiums

Xperia Z2 sports 2.3 GHz quad-core processors, Android 4.4.2 KitKat default OS, 3 GB of RAM, 16 GB internal storage with up to 64 GB of microSD card support and the same 20.7 MP camera found on the Z1.

Reasons Why Upgrading to More Premium

1. More Camera Modes
Xperia Z2 features 4K video recording and Timeshift video on top of other camera modes. It also boasts of a video stabiliser and background defocus on its 20.7 MP camera.

2. Better Audio Experience
Sony came up with the idea of upgrading the audio output of Xperia Z2 to match its great display. Z2 features five different audio engines such as Digital Noise Cancellation, Clear Stereo, Clear Bass, Clear Phase and xLOUD to maximise the dual front stereo speakers.

3. Larger Display with IPS
Now view images and videos on different angles compared than Xperia Z1 using the IPS LCD display technology. See vivid colours with Triluminos and X-Reality engines on various angles.

4. Better Multitasking
Unlike Z1, Xperia Z2 has a larger RAM chipset with 3 GB capacity to sustain more running apps and faster multitasking speed backed up by improved processor cores.

5. More Power
Android 4.4.2 KitKat delivers the improved and all-new STAMINA mode to keep the battery longer than usual. Moreover, Z2 features 200 mAh higher battery pack than Z1.

What Won't You Get

Most upgrades Sony was incremental to improve the display, sound and camera apps. Similar with Galaxy S5, there are great features you won't get from Xperia Z2.

- Processor cores with 64-bit support

- Larger microSD card support of up to 128 GB

- Removable battery unit

- Magnetic Resonance wireless charging

- One-hour charging technology