Neowin published a review on the Samsung Galaxy S9+
A quote from the article:
Like clockwork, Samsung announced the Galaxy S9 and Galaxy S9+, and although they weren't a complete surprise in terms of design, they do have some new tricks up their sleeves. Taking a page from Apple's book this year, Samsung made an effort to really distinguish the S9+ model from its standard S9 variant, giving the former not just an increased display size and battery, but also offering up dual camera sensors. Samsung has been dominating the smartphone world for quite some time, but will it be able to continue its reign?Samsung Galaxy S9+ review: Greater than the sum of its parts