I'm going to outline my percieved similarities, differences, opinions, pros and cons of each. As most people say, TKD is strongly influenced by shotokan karate. I've found karate usually gives at least half of it's class time to warming up, working out and stretching. I know it varies from place to place but the pattern I've observed is that most TKD schools do much more leg stretching (splits, hip rolls etc.) wheras in karate they do more stress stances and push-up/sit-up style exercises, and TKD seems to do half as long of a warm-up (just my own observaion, fellas). I found TKD to be much more fun. You get to free spar a lot earlier, usually than in karate where it progressively becomes one-step, two-step, three-step and finally free sparring. I don't find either of the sparring to be nearly as helpful for learning self-defense as full contact. I think karate is less fun because of the seriousness involved, but I find I get more out of it. TKD is more than just fun too. I think the sport aspect is capable of having a detrimental effect, both to the interpretation of what you're learning and to the outward appearance of the art to others. There isn't a lot of significant difference of technique, IMO. They are both (primarily) linear, have self-defense potential, sport aspects and so called "soke" to watch out for. I suggest learning the basics of karate for a few months first and then try TKD and see if you like it better. Try asking the instructors about each other's arts. A good master will usually be more inclined to talk differences than superiorities and will use these differences rather than percieved superiorities to