Enormous Honour lacks the precocity of his Group One winning half-brother but trainer Chris Waller believes he has the scope to carve out a reputation in his own right.

Lining up for just his sixth start, the three-year-old posted his second successive win at Canterbury with a professional performance in Wednesday's Big Sports Breakfast Handicap (1550m).

At the same age, older brother Triple Honour was already a Group One winner of the 2008 Doncaster Handicap but while Enormous Honour has taken longer to learn his trade, Waller believes the gelding has untapped potential.

"They're very similar types of horses but Triple Honour was there early winning a few races as a two-year-old and the Doncaster at three," Waller said.

"This horse finished 50 metres last at his first trial.

"He keeps getting stronger and I think he is at least a Saturday class horse."

Nash Rawiller settled Enormous Honour in a perfect position trailing the speed and when a gap opened at the top of the straight the horse powered through it to score comfortably by 1-1/2 lengths.

The only other three-year-olds in the race, Meticulously and Royal Adventure, filled the minor placings.

The victory by Enormous Honour gave Waller a double after an earlier win by Done Nothin' Wrong.

Apprentice Koby Jennings had a day to remember after landing his first metropolitan win aboard the Kevin Moses-trained My Sabeel in theraces.com.au Hcp (1250m).