Invoking vs. Evoking
Some believe these terms are interchangeable, but there is a difference.
When one invokes control is given over to the Deity, you invite them to share your head-space. Invocation is a calling into.
Evocation is a calling forth. Your asking your Deity to join you but you have control.
This subject has been can be confusing and has been a topic of hot debates. Some traditions can and do use these terms interchangeably, while others are very specific about the meanings.