Rotosound Tru Bronze 80/20 Bronze Acoustic Guitar Strings

I consider these superior to Ernie Ball and LaBella strings that have similar gauging, are my favorite strings along with GHS. I use the Rotosound light gauge on my Martin and Yamaha travel guitars. I sent a set to a friend who has a full size guitar and he raved over them.

My local luthier suggested me to use these strings for my Taylor Grand Auditorium, so I bought 4-6 sets in 2 different gauges: 11-52 and 12-54. Unfortunately, my experience was not very satisfying.The tone was not particularly loud nor brilliant (in particular they lacked low frequencies); additionally, the strings' surface got oxydated and stained after less than 2 hours. I know that I have an acid sweat problem but other brands are more resistant.