Uniqueness is discovered by subtracting, not adding. You can add so many features to a product to make it look great. However, this does not imply that the product is one-of-a-kind.
Uniqueness appears in the absence of features.
If the iPhone had every feature available, it might be called Android.
To make the product unique, ask “How would customers feel if this feature didn't exist?" If nothing happens, life goes on. Something, there could be a chance. Everything, you may just have found a gem.