Breakin is more like 150-200 hours mfg almost always minimize breakin
I owned a audio store and have done lots of mods capacitors the better quality type
take around 100 hours to stabilize and brightness goes away then another 100 hours to refine . When you compare make sure Everything including all system cables and power cords are the same ,or it won’t be a honest evaluation .
I use the Isotek breakin cd for everything ,and on track 3 it has a system sweep tune up I use 2-3 x a week electrical fields tend to gravitate or stray from center .these CDs , I just down load to the hard drive , they won a couple awards and worth having around ,put on repeat and helps to quick in breakin .
I have read reviews by so called professional reviewers , comparing 2 items then you read in their notes they used a different interconnect , that is pretty ignorant and to not recognize their blunder.