I tried with the same volume, yes. I got 3 out of 4.

I was sent three more and I'm waiting for the results. There is one out of three where I found the production to be lacking and could not notice any difference at all between the two.

It's pretty tough. I'm not good on the technical side so I can't double check his technique. But if he does things properly, then I gotta to admit the difference is almost impossible to notice.