Galaxy S8 vs Galaxy S9 comparison: here's what's changed and what's better

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Samsung just unveiled the new Galaxy S9 and S9+ and boy does it cost a pretty penny. With latest devices, Samsung is taking a page out of Apple's playbook and is pricing the Galaxy S9 and S9+ a bit higher than the Galaxy S8 or S8+ was at launch.
If you already own a Galaxy S8 and was wondering how much better the Galaxy S9 is, we've got your back. We've compiled a table which highlights the areas where the Galaxy S9 and S9+ is better than the Galaxy S8 and S8+.
Galaxy S8 (S8+)Galaxy S9 (S9+)

Dimension
Galaxy S8
148.9mm x 68.1mm x 8.0mm
155g

Galaxy S8+
159.5mm x 73.4mm x 8.1mm
173g
Galaxy S9
147.7mm x 68.7 x 8.5mm
163g

Galaxy S9+
158.1mm x 73.8mm x 8.5mm
189g

Display
Galaxy S8
Infinity Display
5.8" Curved Super AMOLED
Quad HD+ (2960 x 1440)
18.5:9
570ppi

Galaxy S8+
Infinity Display
6.2" Curved Super AMOLED
Quad HD+ (2960 x 1440)
18.5:9
529ppi
Galaxy S9
Infinity Display
5.8" Curved Super AMOLED
Quad HD+ (2960 x 1440)
18.5:9
570ppi

Galaxy S9+
Infinity Display
6.2" Curved Super AMOLED
Quad HD+ (2960 x 1440)
18.5:9
529ppi

Camera
Rear Camera
Dual Pixel 12MP (f1.7)  with Phase Detection AutoFocus & Optical Image Stabilisation

Front Camera
8MP (F1.7) with Phase Detection AutoFocus
Galaxy S9
Rear Camera
Super Speed Dual Pixel 12MP variable aperture (f1.5/f2.4)  with Phase Detection AutoFocus & Optical Image Stabilisation

Front Camera
8MP (F1.7) with Phase Detection AutoFocus

Galaxy S9+
Rear Camera
Wide angle Super Speed Dual Pixel 12MP variable aperture (f1.5/f2.4)  with Phase Detection AutoFocus & Optical Image Stabilisation
               &
12MP variable aperture (f2.4)  with Phase Detection AutoFocus & Optical Image Stabilisation

Front Camera
8MP (F1.7) with Phase Detection AutoFocus

Processor
Qualcomm Snapdragon 835  octa-core processor (4x 2.35GHz Kyro 385  + 4x 1.9GHz Kyro)  with Adreno 540 GPU

or

Samsung Exynos 8895 octa-core processor (4x 2.3GHz Mongoose M2  + 4x1.7 GHz Cortex A-53) with Mali-G71 MP20
Qualcomm Snapdragon 845  octa-core processor (4x2.7GHz Kyro 385 Gold  + 4x1.7GHz Kyro 385 Silver)  with Adreno 630 GPU

or

Samsung Exynos 9810 octa-core processor (4x 2.8GHz Mongoose M3  + 4x 1.7 GHz Cortex A-55) with Mali-G72 MP18

Memory
4GB RAM
64GB Internal memory
MicroSD (up to 256GB)
Galaxy S9
4GB RAM
64GB/126GB/256GB Internal memory
MicroSD (up to 400GB)
Galaxy S9+
6GB RAM
64GB/126GB/256GB Internal memory
MicroSD (up to 400GB)

Biometrics Authentication
Iris, Fingerprint, FaceIris, Fingerprint, Face, Inteliigient scan

Audio
Single SpeakerStereo speakers tuned by AKG,
Dolby Atmos Surround sound

Battery
Galaxy S8
3,000mAh

Glaxy S8+
3,500mAh
Galaxy S9
3,000mAh

Galaxy S9+
3,500mAh

While the Galaxy S9 trumps the Galaxy S8 with the variable aperture (and the dual cameras in the Galaxy S9+), location of the fingerprint scanner, stereo speakers, and newer processor as it should. The Galaxy S8 is still a very capable device even after a year and with the price expected to drop even further to midrange territory making it great value for money.