Compared to the Supcase: the Poetic one has proper bottom port cutouts, a longer 3 year warranty, better feeling rubber, kickstand pull tab is larger and much easier to pull the kickstand out, increased rubber on corners that help with drops, comes with 2 frames (one to use your own glass screen protector and one with their built-in one), better feeling/more tactile buttons, nicer rear design in my opinion........just a few things to name.
Trust me, go with the Poetic case if you're on the fence. To me it's the perfect rugged case. It's definitely higher quality and better thought out. I used to be a huge Supcase fan until I found Poetic.