Welcome!

Frustratingly, the answer is all of the above. The CogAT can be higher, lower, or comparable to an individually-administered IQ measure. It is usually somewhere in the same vicinity, but not necessarily. I wouldn't use it to estimate an IQ.

But regardless of the "true" IQ score, you appear to be a bright, capable, and articulate young person. I hope you are finding your educational and personal development needs met these days, whether in or out of school.

...pronounced like the long vowel and first letter of the alphabet...