So take Anvil and AS SSD and test a drive that is 50% full and tell me what you see. I don't take many things seriously but testing is one of them. Been there and done that for weeks at a time.

What give the advantage to SF is the type of data stored on the drive. The same flash at 50% full is the same speed, the SF controller manipulates the data on the flash so less of it is stored and that is why SF gets the nod in that test. No one keeps just compressible or incompressible data on their boot drive. When I built the test I used both compressible and incompressible and use the same ratio of what I had on my notebook at the time.

As for what the manufactures spec their drive at, we all know that is hocus pocus because those numbers are based on an empty drive. No one has an empty boot drive. Some SF based drives are marketed with both compressible and incompressible speeds.