I've now had a chance to spend a few days with a re-voiced 612ce 12-fret. Though I wish that I was as impressed as most folks seem to be with the changes to the series, I'm not. However the time that I got to spend with it just made me even happier with the three Taylor's that I do have. Maybe the body size and/or 12-fret configuration just didn't do it justice. After about a day and a half comparing it to my 522ce 12 fret I came up with a few key differences and similarities. The 612 had a very solid and present bass, was even across the register, very responsive and was effortless to play. The 522ce had a spongy bass, great immediate attack, nice blooming and focused mids and crisp highs. The 612, while even across the spectrum, was almost fuzzy in the mids and the treble was definitely lacking giving my ear the impression of imbalance while the 522 though technically more focused seemed balanced by its drier tones. The sustain was pretty even since the 612ce would hold a note for roughly 5-7 seconds and then quickly decay. The 522ce would hold a note for 4-6 seconds and slowly decay for 1-2 seconds more. For Gypsy jazz and blues, the 522ce handled that type of thumping and picking with ease while the 612ce didn't really seem like it wanted to hold up and just didn't having that driving focus. Finger picking was so easy with the 612 and a light touch had great results. What kept getting at me were those fuzzy mids and cut highs. It really didn't do justice for pieces where I wanted sparkle and every note to be heard with out fighting each other. So though I have to push my 522ce a bit to get to the same volume, I have absolutely no fear about the notes not being clear enough or the highs not sparkling.
I also got to compare the 612ce to an 812ce 12-fret and though there are similarities, I felt like the 812ce had just a touch more volume. Yes, the bass wasn't as solid, but those sparkling highs and slightly dampened mids make it a much better guitar for finger style, allowing note separation and allowing then to swirl, mingle and intertwine more musically.
Maybe the bigger body sizes are better. What did Timfitz call the new 600 series, Rosemahogany? I totally agree with that.