I don't know about Thermaltakes previous attempts on making a Socket462 Golden Orb, but I can attest that their Socket370 Golden Orb is a real pain to install. The screw on retention mechanism just sucks.
However, I've just installed the new Chrome Orbs on a Duron 700 today, and it comes with a more conventional clip retention device which is much easier to put on. I'd say its easier than the retail intel HSF retention mechanisms.
In light of that, I'd recommend the Chrome Orb if your budget isn't that high, but would still like decent cooling. However, if you have a KT7, you're out of luck with the Chrome Orb since the capacitors will get in the way. It works on the A7V though.