The most important number to consider when choosing your Galaxy is 0.21-inch. That's how much wider the Galaxy S9+ is compared with the S9 (it's also 0.92-ounce heavier), and that can make a real difference when it comes to reaching your thumb all the way across the screen. I've stuck for a while with the idea (from an old LG study) that the average thumb can reach across a 2.8-inch wide phone. The Galaxy S9 and S9+ fall just on either side of that line, which can matter for comfort.
Method to
recover contacts from samsung s9:
Samsung Data Recovery supports contacts recovery from any Samsung Galaxy s9 phones as well as other HTC/LG/Motorola/Sony Android smartphones, even if your phone screens were broken. Not only WhatsApp messages, you can even recover the WhatsApp attachments such as videos, music, and images, etc.
More info:
Recover samsung s6 photos