I am sure that others will offer reasons that I will not have covered, but these are very good starters.
1. The original cable you were using prior to the switch was very poorly constructed and/or of a very high gauge wire for power supply use.
2. You have some form of electrical interference and the better shielding is helping with the problem.
3. There may be a problem with the way the power supply was designed in the equipment you are switching power cables with.
4. You are convinced that a difference will take place and therefore it does.
Let me know if these heip.
1. The original cable you were using prior to the switch was very poorly constructed and/or of a very high gauge wire for power supply use.
2. You have some form of electrical interference and the better shielding is helping with the problem.
3. There may be a problem with the way the power supply was designed in the equipment you are switching power cables with.
4. You are convinced that a difference will take place and therefore it does.
Let me know if these heip.