Let’s see, I would say 98% system and up to 2% recording. Depends on how you look at it, 99% makes sense to me… as a great system can make bad recordings sound better. About 85% of recordings are average, 10% great, and 5% real stinkers. In the fifty years I have been pursuing high end audio my system an the playback of, for instance the anlbums I bought in the ‘70s, have sounded better and better, by an order of magnitude.
If you hold your system at one level, then the difference in recording becomes the major factor.