I'm going to update this test a few hours later with a newer topic.
And I will provide better AB blind test source.
Since I noticed later the original VBQ has 5Kernals in MF only, I guess the resulting files is a little bit unfair due to Waves 550A has 3Kernals and much higher 2nd order harmonics. And Waves 550A is louder than VBQ without adjustment.
The result: a= Waves 550A b= VBQ
I found the blind test result interesting because it's not trival to tell if I've already known the answer. The low frequency boost of Waves is too tight and a little bit artificial. The high of VBQ is more open. Anyway the Waves 550A is praised and do a better job than S*L series.
Maybe I should try the famous mid-frequnecy boost to showcase A*I 550a.
Latter on, I will do another blind test with the new released VBQ and hope the differences will be bigger