Yes Harlan, I read that thread and that's why I asked this question

There are many schools ShotoKan based but are not really shotokan.

Kyokushin
Go Kan Ryu
Wado Ryu
Asai Ryu
Gosoku Ryu

Are just a few . Why are so different? Did the Founders train with each other? Are their similarities actuallly ot that similar? Why is there differences and why is Kyokushin so hardcore even compared to Gosoku Ryu etc?
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A man is but the product of his thoughts what he thinks, he becomes.

Ken