Solid states more accurate than tubes?
You ask for "accuracy", which means NO coloration’s.
Of coarse they are, any "good" solid state is more accurate than "good" tubes, especially into medium to hard to drive speakers.
An OTL tube amp into very easy/efficient speakers can equal them for accuracy and also on the test bench, but then those easy to drive/efficient speakers themselves are not the most accurate things to listen to.
Cheers George