I already had an older redwood-topped Taylor when I specked out the redwood top on by BTO, but I did some additional research. Like any top wood, different top sets can vary in stiffness. I knew that redwood was typically in between cedar and sitka spruce in terms of stiffness, and discussed this with my dealer. I don't particularly like cedar-topped guitars, so I requested that my redwood top lean more toward the stiffness of sitka rather than cedar.
My dealer was actually out at Taylor before my guitar was built and sent me photos of several redwood sets. One was prettier that the others, but I asked them to pick the stiffest set (which turned out to not be the best-looking one).
I could not be happier with my guitar. Very nice and warm for my solo fingerstyle - not mushy like most cedar guitars I've played - but can be crisp and somewhat punchy when flat picked. I think redwood has great string separation.
If you play fingerstye, I do not think you can go wrong with a redwood top.
As per you picture request, here's my BTO:


I've read that redwood can sound a lot like Engelmann spruce, but my experience has been different. The only old growth redwood guitars that I have ever played are the two I have owned. Both Taylor Grand Concerts with EI rosewood. The engelmann-topped Grand Concerts I have played have been drier and thinner sounding to me, with less tonal complexity than either of my redwood guitars. But maybe it was just my particular guitars.
I've only played a few Sinker redwood Taylors, and none were Rosewood Grand Concerts, so I can''t really say much about the comparison between redwood and Sinker redwood. Some folks have said that the Sinker tends to be stiffer and is even closer to sitka, but still has most of the warmth of redwood. I suspect that with the mineral deposits it has marginally higher density than non-sinker redwood and in general is slightly stiffer.
I believe there was a comment in a Wood and Steel that all of Taylor's sinker redwood tops have come from just one log. So if you look their sinker-topped guitars you see lots of color and striping variations. So I suspect density and stiffness variations as well.