The application of any technique in free sparring, is circumstantial, and in response to a situation. Kihon, and kata are basic and basic variations that must be adjusted for fighting. Each styles basic form, affects the body in different ways, and no way is right or wrong, only different. In the late 60s, all TKD fighters could yokogeri very high, very few karateka could. It was probably because of kihon training. In those days, TKD was weak in maegeri. Again probably because of kihon. There is no best way, each style has its good and bad points. In open karate competitions that I have watched, very few TKD persons were able to beat a karateka. While I havn't been to any open TKD matches, I'm sure that karateka would have problems winning.