I own both the Freud #508 (SuperDado - stacked set with shims and 1/16", 3/32", 1/8" chippers) and the #608 (Dial-a-Dado - uses 1/8" chippers and a dial hub that adjusts 0.004" per tick mark). Both are excellent dado sets, but pricey at roughly $200 and $250.
The Dial-a-Dado #608 is nice due to it's 0.004" adustment increments without the need for any shims, but the dial is very deep, thus limiting me to just over 5/8" width maximum on my Steel City hybrid saw.
So, to reach my goal of just over 3/4" I had to add the #508 stacked dado set to my collection. Now I have the best of both worlds (though at a bit of a price). The stacked set is wonderful for anything that is in 1/32" increments, the Dial-a-Dado is great for anything of odd widths. Though each is capable of the same widths if you go back and add the necessary shims to the stacked set (which, of course, requires removing the outer cutter to adjust the shims versus simply loosening the arbor nut and rotating the dial for +/- 0.004" per tick, then retighten arbor nut).
Both sets use 24-tooth carbide-tipped outside cutters and a combination of primarily 1/8" chippers with 4 carbide-tipped teeth each. Both cut cleanly with little, if any, tearout -- even in laminates and veneers. They both cut flat-bottomed dados with only slight visible scoring (primarily on wide multi-pass dado cuts) from the ATB outside cutters, but the residual scoring is so slight that a touch of sandpaper, or use of a water-based glue will erase them. If only a single-pass dado is made, the outside scores are not noticeable. This shallow score cut is the primary reason these dado sets create so little tearout versus a 100% square-bottomed dado -- it's equivalent to pre-scoring the cut-line with a utility knife.
That said, if I were to go back and do things again, I probably would have settled for just the Freud #508 stacked set. I bought the #608 when I was first starting (well, restarting actually) my hobby a few years back, which I purchased at the same time I ordered my table saw.