Yes, I did.

I did the listening tests with my actual setup changing Symphonic Line and MBL.

I preferred the sound with Symphonic Line in most of the cases. Only with soprano voices is for me a little better the sound with MBL amplifier.

I listen mainly to classical music although the tests were made with many kinds  of music. Symphonic Line has for me more dynamics and "presence"

I did also the tests using Innuos ZenMk3 and Lampizator Gulfstream as sources.