The second difference, which derives from the first, is that the power of the Sefirot was exactly calculated in accordance with God’s will. What this means is that the Master, blessed be He, does not want to act in any other way except this. However, had He wanted, and whenever He may want, He can increase their power according to His will. With the power they have at present, it appears that the Other Side can challenge them and prevent them from functioning.
However, if Eyn Sof, blessed be He, had wanted, He could have increased the power of the Sefirot as much as He liked and the Other Side would no longer have the slightest ability to challenge the Holy Side. But compared to the power of the Sefirot, the power of the Other Side is truly limited. It only has what is in it now and it cannot in any way go outside its limit, even if it wanted.