The Galaxy S8 from Samsung comes in two flavors this year. You can choose between the classic S8 or the S8+. The standard S8 comes with a 5.8" screen with 1440 x 2960 pixels. The Snapdragon 835 chipset has an octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo) CPU and an Adreno 540 GPU. You'll have options for either 64GB or 128GB of internal storage and 4GB of RAM. The primary camera has a 12MP sensor and the selfie camera is 8MP. The 3000mAh battery comes with quick charging and wireless charging.
The larger S8+ has a huge 6.2" screen with the same resolution. With this bigger phone you'll get a dual camera 12MP setup in the back and the selfie camera is 8MP. The battery is a little larger at 3500mAh. Other than that, these phones share the same CPU, GPU and RAM.