Click here to know more about Goals.
Step 1:
The main difference is that in OKRs the updates done in the Key result will show progress in the target value i.e. Objective.

In Goals, you can make your own measurement as your total target value by setting the weights.

The updates you're making in each goal will change the value in target.
Step 2:
Also we can associate Key Results as a Goal and we can set weight for that.

We can include goals in Performance Review by enabling the toggle for goals in performance review in settings.
Note: Only Super Users will be able to enable the toggle for including goals in Performance Review for assessment.

While doing an assessment for a review the Goals will be present in a separate column.

Goals connect with both OKR and performance review to improve business growth.