For doing demolition work, you'd select a less conventional style cutter tooth. You'd want one much like RapCo's 'terminator' chain. This chain would have a less agressive cutter tooth for better impact resistance, as well as a pair of cutting chassis for added strength. I'd imagine this type of chain wouldn't be very usefull for regular wood felling/bucking.
For conventional wood cutting, the only real benefit to the Carbide chain would be it's ability to hold an edge after cutting dirty wood, as well as longer sharpening intervals. Hitting a foreign object would still pose a great danger to the Carbide, as it is extremely brittle.
Make no mistake, Carbide chains are very application specific. You can tear up a $120 carbide chain, just as easy as your $20 Oregon chain if you use it for the wrong reasons.
Justin