Now this is the way I myself understand the difference between centerline and circular movement. I am sure their are other opinions out there and would be happy to see some detailed explanation of what they are so we can compare, grow, and learn from each other.
I'm sure there will be smart ass remarks for our viewing pleasure as well, which will hold no merit and have no more substance than they usually do. But we'll all get a good laugh like watching monkeys smoke cigarettes.
So here goes. What I understand is that with center line attacks you are only attacking from one line and changing direction is sometimes if not often difficult. Also block are usually block and attacks are usually attacks. Some arts incorporate blocks into attacks even with centerline, but most teach them separate.
With circular movement you cover a wide range of the target area between yourself and your attacker. You can also launch your attack from any point in the circle, making it somewhat more difficult to read and a bit easier to change directions. Also circular movement allows you to block an incoming attack and then continue into a strike, or throw all in the same motion. These are usually determined by what your opponent as well as your footwork is doing at the time. Remember your not the only one with input in a fight so your opponents position and movement as well as their reaction can change the outcome.
This is only my view and what I have gathered from my studies and what I was taught. This may not be agreed upon by others and that's fine. But at the end of the day this is still
my understanding and belief.
Your free to study and formulate your own opinion as always.
Awesome question Tanto thanks for stimulating the brain cell and helping me to understand what I do better through discourse.
KOTF