Yes, at some time I will have to explain it, maybe a post-long response should come, but in a few words, the way how do you interpret matters. So the same written music, yes, but I am sure you can feel the difference if one person plays with a lot of affection, with dynamic layers, agogic expression, with grace. Or you see a plain interpretation, without dynamic layers. Or you hear some playing but feel the struggle and you also dont enjoy it anymore. The stylistic criteria. The technique requirements, the ease of how do you play... So yes, there are huge differences, but it is also subjective feeling if all this is good and great, and we have two excellent musicians bringing all the best, who is the better? You are right in your question. Well, that is the part when the jury has to bring a personal judgment and make one great musician just happy or sad, based on their own perception...