The Aramith Tournaments are Duramith resin and absolutely stay cleaner longer than Centennials. I have both sets and are both within a year of the same age. I like the Tournament set so much I have a brand new second set waiting in the box when I replace my cloth.I do really like the look of the Centennials!!
Looked at the Dynaspheres but I like the look of the Aramith's and the Brunswicks better.