I'm not sure by your question if you're thinking about how these corks work, but here's my two cents worth. The benefit of using a Belgian cork finished bottle over capping is really more of an artistic, than practical one. It allows you to close your bottle in the traditional style of a Belgian beer. But, you don't shove it down the bottle and cap it with a crown cap. You put it partway down the bottle then tie it down with a wire cork hood - like the one shown at the bottom of the page in the link you included from morebeer. The cool thing about using a Belgian cork is having the straight cork turn into it's mushroom shape over time as the carbonation in the beer tries to force it out of the bottle, with the wire hood holding it in place.