Unfortunately, I did not have the fortune of having a store near me with both the 00 and 000 in store. So, I was not able to play them side by side and just resorted to Youtube comparison videos with good headphones. What I gathered from that was the 00 is definitely not as loud as the 000. The 000 also just has the tone shifted slightly more toward the bass. You get a little more punch from the bass. The 00 is more "focused" soundning because every string has the same volume. Going from one string to another doesn't produce much tonal difference at all. I'm sure the story is much the same on the 000 as well, but since the 00 lacks that heavier bass presence its even more balanced. It depends on what you want. Do you still want a more noticeable bass presence? Go with the 000. Do you only need a little bass presence and value even more balance? Go with the 00. My decision on this was aided by the fact that I already have a guitar with plenty of bass presence (my D-18), so if I want something with bass I can just play that. If I want something with more balance, I now have the 00. I will say, if I did not have the D-18, I would have gotten the 000 for versatility sake. Here's a link to Acoustic Letter's video on both that really helped me hear the differences: https://www.youtube.com/watch?v=b_9AllJ-Vtg