The last LP12 I had was in 2005 current spec at the time, lingo 2 etc.
I initially used naim electronics with it - then a BAT ph10 se, BAT 51se and Benz ebony LP - much better than the naim sound. I used the same Bat gear and cart with the sme and Kuzma so consistent ancillaries.
Yes I am sure the LP12 has improved since then, so has everything else.
As I said my friend's Linn gives me some insight to the current Linn sound.
I live in the UK and there is still a big Linn following the same with naim. Go on the naim forums and posters believe in nothing else.
I am sure your Linn sounds great - btw was it the XL DC kuzma and 4pt, cartridge? - when you did your comparison?
As you say the ancillary equipment can influence the result positively or negatively with any gear .
I have done quite a bit of experimentation with cartridges, arm and phonostages - some combination just don't work.