I will put the simple example to get some ideas between these two words. 上司は家に帰りました。He left the office. i will be not able to reach him out today, therefore recall him tomorrow. I will put the simple example to get some ideas between these two words. 上司は家に帰りました。He left the office. I will call him tomorrow, then. 上司は家に戻りました。He was back home, then will return to the office. I will ask the possible time to call him again within the same day. Hope this helps you.

The issue is basically relates to tones or diction that the speaker care for, and differs from person to person, however, I realize that it contains, at least, a difference that 戻る is used from 私 point of view or 'me attitude' while 帰る is used from あなた point of view or 'you attitude', which is not invariably used but has an obvious tendency to be used. e.g. Someone says: to his director: すぐに帰ります。(director is the boss) impilict meaning: He come back to the office from outside. to his director: すぐに戻ります。(director is the boss) implicit meaning: He come back to the office from the US, then he is going to the US again after short stay. to his colleague: すぐに帰ります。(no boss) implicit meaning: He is going to the US from the Japanese office. to his colleague: すぐに戻ります。(no boss) implicit meaning: He is going to the Japanese office from the US office. to his customer: すぐに帰ります。(customer is the boss) implicit meaning: He is going to leave soon from the customers office.(They are in the customer's office) to his colleague: すぐに戻ります。(customer is the boss) implicit meaning: He is going to his office,then back again to the customer's office soon.

A similar question 5 years ago: http://www.italki.com/question/82203 The answers were without exception not appropriate, not accurate , but not absolutely failure. I will consider this tough topic for you and myself.