[CuidadoCaliente]

In my admittedly limited experience, I have found that Augustine strings sound much better than D'Addario.
About two weeks ago I put Augustine Classic Black strings on a 2016 Cordoba C5 that I have had since February. I had previously used primarily D'Addario Pro-Arte nylon normal tension strings with brief experiments with D'Addario Pro-Arte hard tension and low tension strings. The Augustine strings sound so much better to me than the D'Addario strings that I doubt that I will ever use D'Addario strings again. The Augustine trebles are brighter and the lower tension bass strings reduced the somewhat overwhelming bass frequencies on my guitar. To my ears, it sounds like a "real" classical guitar now. After hearing the obvious improvement, I also put Augustine Classic Black strings on my 2008 Manuel Rodriquez C3F flamenco guitar. The difference from the D'Addario strings was less dramatic than the Cordoba, but the trebles were definitely brighter. I will probably try Augustine Classic Reds on my flamenco guitar the next time I change strings.
Another difference that I noticed was that the Augustine strings only had to stretch for two days before they would stay in tune while D'Addarios usually took three days.
It is probably important to note that I play mostly jazz and bossa nova and I pluck the strings with the flesh of my fingertips and not the fingernail. Before I heard the Augustine strings I assumed that the lack of treble in my tone was caused by not plucking with my nails, but now I see that it was the D'Addario strings.