let's be honest here. coleman is great at moving forward and making his clever runs on the right. This makes him much more exciting to the eye and when we pay against weaker opponents, the opponent falls back and not threaten our flank that much.
But when we play with quicker movement teams and fas wingers, Coleman gets caught out. He has not been the best full back for a few seasons now, often reading the defensive game a little slower or being out of position.
I have not seen enough of Holgate but i think his reading of the defensive game is better than Coleman.