Solid states more accurate than tubes?

I have some tube amps.  I've been recently swapping out interconnects.  The difference is apparent.  Of course, how apparent depends on the amp and the speakers.  

I took these over to a buddy's place who had also heard the differences at my place.  We played on his nice SS system.  We pretty much could not tell the difference.  

Why?  Only guesses, but we all (others too) heard distinct differences on some of my tube amps.  

I assume by true fidelity you mean high fidelity? High fidelity in audio means reproduction of sound without distortion and color that remains true to the original. In order to achieve that you need very accurate measuring equipment. The biggest obstacle now is speakers and room. 

SS is always more accurate.

A digital camera is more accurate than was Ansel Adam's camera and film.

Few would argue the beauty of Adam's work.

I thought the question was which is more accurate in reproducing not creating. The artist   and associatiated technicians creates, we simply try to reproduce what they created. In order to be faithful to that creation then accuracy is paramount. If I don't care for the creation then I can color it with distortion or tone controls that's my decision. But to answer the original question which is more accurate solid state or tubes in reproducing I would say solid state.