What is the point of comparing these 2 sites with each other? there are also many more sites that you could compare with each other? Then you can also consider several criteria to compare with each other and you get a much better picture.
It is his own personal opinion based on the experience he had with the two casinos. He stated in his opening post that he played on Nitrogen for 2 years and switched to Stake, where he is now gambling for over a year. it's a good comparison where you can see how the two sites perform in terms of withdrawal speed, customer support, wagering limits, and stuff like that.