According to your definition, there is no difference.
We don’t engage in debate with the intent to convert. Apologetics isn’t doing that. It’s presenting the faith and letting the Holy Spirit do the convincing, if any needs doing. Anything beyond than that is being intrusive on another’s conscience and free will.
Apologetics, Evangelism, and Proselytizing are different. Proselytizing is wrong, as described in this thread.
Apologetics - if this is meant by the term “debating” - puts ideas out **only to those who are interested. ** It affirms what (we) believe as true, on 3 levels:
That the evidence for God’s existence is greater than against;
That Christianity is a fuller exposition of the Truth than other religions;
That Catholicism is the fullness of Christian Truth.
It may be a brief conversation, posting on the Internet, or some other communication.
Jimmy Akin is a better Apologist than me; but my sister-in-law with doubts doesn’t know Jimmy, and knows me. So I try to couch my answers as “to the best of my knowledge”.
Apologetics can clear the way for evangelism, if there are intellectual difficulties or misconceptions blocking the person taking the next step. Keep in mind many Catholics have been raised with incomplete religious education, compounded by manipulative media, so that is who I need to defend Catholicism with the most. Apologetics is primarily listening, and then some talking/writing.
Evangelism has more to do with the person’s own relationship with God, and others - including the evangelist. It is about conversion.
I try hard to be as friendly, and respectful as I can. The worst, worst, awful “apologetics” comes from Catholics who argue with people, who take the Faith like a 2x4 and hit any and all comers. God silent me should I ever lapse into that.