I am not a Centrotec rusted on fan but I bought the Festool CS bit many years ago and it has done well over ten thousand holes and shows no sign of dying. I took a big deep breath because it cost so much when I bought it but all these years later I think it is the single best Festool product I have.
The biggest advantage of the Amana offerings is that they are carbide tipped. This is of at least mild concern for drilling into wood/wood products because of the wear factor. They last longer, but the real beauty is if you need to countersink into some other materials. Plastic laminate (HPL) is especially difficult. It's not hard to drill into, because it's so thin, but it is exceptionally "hard", so it wears on cutters of all kinds, even carbide, but much less than the typical steel of countersinks.
The common 4 flute ones, like Fuller, have pretty thin flutes, they wear/dull very fast, plus they are driven by the drill bit itself, with grub screws. When I discovered the WolfCraft version, I switched immediately. They are 3 flute, with much thicker flutes
and they drive by the hex rather than the bit shank. I used them for years, until the first time I came across a need to drill/countersink into thick phenolic. I actually had to build some cabinets from that stuff. The steel countersink just wasn't having it. This was when I found Amana. The carbide tips are the perfect solution. I knew nothing of Centrotec at that time, the CSX got me into it later.
