My personal experience is that Stazon is much better to use. Brilliance inks fade with heat and time. My mom made tile coasters with Brilliance, but after putting a hot cup of tea on it several times, the color looked faded and washed out. Stazon images haven't had that problem.
IMHO, stained stamps are just a sign of well-loved stamps
. However, I do use the Stazon cleaner, which works beautifully.