First and foremost is the type of use. Are you looking for a beginner level Pogo Stick/ Pro level for tricks/ fun toy for your kids? First, you should get sorted in this manner. Then if you go through the above list or any other reliable articles on the internet, you will find the best Pogo stick for your use.
Best for you to go through product specification of each product.
You can go through the material used in the Pogo stick. Then you should also consider the durability and defects. For this, you can go through the reviews and ratings on Amazon or any other reliable source and decide. By this, you can find the best Quality Pogo sticks.
So when you consider the buying criteria and review of each product you will definitely identify differences among products. This means every Pogo stick is not the same. It is better if you can stick to the routine of the buying to minimize any problems you might face and buy the best Pogo stick, because ultimately Pogo sticks are a massive step for fun or I should say a jump.