The difference in stains makes a huge difference to the builder. Dyes penetrate and stain everything in the grain structure the same. Pigment stains start life as a powder, are mixed in solution with alcohol and a variety of solvents (which by the way is the secret to the quality) and act differently when applied. The pigment stains will lay in the cell structure in masse and creates the concentration of the color. The alcohol and compatible solvent evaporate and leave the pigment deposited in the structure. (I only know this cause we have a chemist make our own line of stains in response to the doubling in cost of the other major stain maker). ANyway, The solvent, beautiful thing it is, is the secret to how the stain enters the grain, how fast it penetrates, and how smoothly these transitions can take place. In other words, a blend line! Our stain solvent blends so much better and doesn't leave a hard line between the applications.
Fading.... Good comments. All will fade, no matter what, some worse than others, regardless of indoor or outdoor. The industry answer to this is the finish you put on. I worked with our chemist to develop a finish to eliminate fading. So far so good! Its a satin, not a gloss, and is as close as I can get with a modern finish to the look of some of the old. Its UV protectant, so no fading under it. We call it DuraFin. Used with boiled linseed oil to thin it as much as 30% buys you a little finishing time, but not much. I put it on by hand rubbing and its pretty quick. Additional coats are optional.
Susie