quality levels does not jump in the same quantity. When we have say a cartridge that performs at 90% quality level against the very best that performs at 99%.
Pass from 95% to 99% is extremely difficult task for the manufacturer that needs not only knowledge and skills but a lot of tests and time consuming that when the cartridge new model comes out in the market the MK2 version price is to high that we can think as you: that maybe is not justified because only 4% better.
No, it's not 4x performance of the low end models. It can't be but what is for sure is that the top ones are better and for you can attest it you have to own a system that can tell you the differences for the better.
R.