Im 6:3 160lbs been tall and lanky all my life due to genetic condition. I was able to train early(ill advised) in GOJU karate(Peter Urban style) as a youth. It was great for the guys lower to the ground who could reach and grab,sweep,throw. Powerful Japanese system. My problem was/is my foot deformity of unbelieable flat feet so hard surfaces are murder to train on for my bony deformed feet. I did however develop one hell of a reverse punch. Dropped several people in tournaments with it even while training in a different system(TKD). I guess it will boil down to which techniques and training regimen you are most comfortable with. I watched the world martial arts competition on eyewitness news here in the states around 1970 and 1971. The Muay Thai cats destroyed EVERYBODY including China. Nobody could get inside their kicks and were just sitting ducks for those devastating round house kicks. The next year had the same result. The next year China refused to send a team claiming Muay was to deadly an art to be a sport.