Yes, Samsung Galaxy S9 Plus does have the IRIS scanner.
Samsung Galaxy S9 Plus has very powerful ARM Mali G72 MP18 as GPU. It's 18 core GPU and has 572 MHz frequency.
Samsung Galaxy S9 Plus has Samsung Exynos 9 9810 SoC. It's octa-core processor and has 2.7 GHz + 1.95 GHz clock rate.
Samsung Galaxy S9 Plus comes in 3 colors and in 2 variants. 64GB variant is available in 3 colors - Midnight Black, Lilac Purple & Coral Blue. While 256GB variant comes only in Midnight Black color.
Samsung Galaxy S9 Plus has 3500 mAh Li-Polymer battery. It also supports wireless charging and quick charging.
The Galaxy S9 Plus is a good phone, but it's more like a Galaxy S8 2 than a whole new flagship. And that, is disappointing.
The Samsung Galaxy S9 Plus is a beast of a smartphone – a great all-rounder and the pick of Samsung’s 2018 flagships