The martial arts discipline is slightly removed from the World Taekwondo Federation form contested at the Olympic Games.
"There is quite a bit of difference between the two," he said.
"In the Olympics they wear body padding and you can't punch to the head, whereas in the ITF you can do anything - as long as it's above the belt.
"It's hard to distinguish between the two, it's more of a preference than anything.
"It's like asking someone which they prefer between rugby and rugby league - everyone has always got their own opinions on it."
The weekend featured sparring, patterns, speciality and breaking, with the July nationals to also include teams classifications.
The Midlands team will be selected in the coming months, with Black generally impressed by the performances of Tauranga's hopefuls.
"All of them did pretty well, some of them you could see had trained a lot harder since the last regionals.
"Hopefully, we can put a good team together for nationals seeing as though they are being held in Tauranga."