I did not read the review - audio is so subjective and in the end personal never mind depending on what other pces your have paired up so below are only my thoughts.
I owned the 5se and had the chance to demo the 6 THINKING that it will likely only offer minor improvements - but brand new out of the box I could already clearly hear positive SQ differences. I had a Anniversary also in my system which I could have gotten at a very attractive price - very nice but in the end I preferred the 6 never mind taking up less real estate.I also had a 10 which I did prefer over the Anniversary but upon listening to the 6 I found the later to offer more similarities SQ wise than differences - hence my decision to purchase the 6 and use that extra coin for music.
I also prefer the 6 over my highly regarded Vac pre's (Sig & Master) too which shocked me, both costing substantially more.
As long as you are listening to music that's all that matters - there will always be something around the corner that offers something different.