I've used regular Martin SP lights on my Taylor 214 for years. I recently bought a used Taylor 510 LTD (lucky me!) and found that the SP's were a bit twangy for that guitar. After trying about half a dozen other types of strings, I switched to the Cleartone version of the SP's and I am very pleased with the tonal clarity. I play exclusively non-amplified finger style and never use a pick, so a clean, natural tone from each string is important to my ear.
The lifespan of the Cleartones is fairly stunning, too. I used to change the regular SP's on my 214 every few weeks (I play a lot). Approaching the two month mark, I finally changed the Cleartones on my 510 only because I wanted to clean and oil the fret board, polish my frets, and give my instrument a little TLC. But the old set was still sounding great. So I guess the downside is that the fret board won't be serviced as often using the Cleartones.
The nice thing is that the tone seems to remain constant throughout the life of the strings. After the first few hours of "spangley" newness, they settle in to a very consistent and reliable sound.