[QUOTE]Originally posted by SamurangWarrior:
Which is more effective haidong gumdo or kendo?[/QUOTE]

Back to your original question. I do both. Kendo is only a sport, so assuming you mean for a real life application of which is more deadly, I'd say HG.

Now to contradict myself, and confuse such a simple answer, in the only real life confrontation I had with a weapon since training in these MA's, I used the Kendo stance and had Kendo as the technique in mind...go figure. Course I wasn't holding a katana either.