The pair are both two from two and will meet for the first time in the Canterbury Park Trotting Cup at Addington on Friday week. The mutual respect from their trainers is obvious.
"Sundees Son has been very, very good and has gone to another level," says Mark Purdon, who co-trains Oscar Bonavena.
"It will be interesting when they clash because they both have very high speed for trotters."
John Dunn is the driver of Sundees Son and he takes a breath when asked about Oscar Bonavena.
"He has looked really good," says Dunn.
"I don't want to be giving him head starts in too many races because like my horse he can sprint like a pacer."
Which brings us to the R50 to R60 pacing trial at Rangiora today, which will include Sundees Son trotting.
Dunn has put him in the standing start heat against pacers to see how he handles starting among other horses on the front line, rather than starting on the unruly.
Last season that could have been a disaster as Sundees Son's manners didn't match his motor but in his last six starts he has been faultless.
"He has definitely grown up and strengthened up and I want to try him off the unruly in the workout to see whether we can take him off it for standing starts full time.
"He is already back in the draw for mobiles and the way Oscar is trotting we don't want to be giving him 10m, 20m or even 30m start, which is what can happen when you start on the unruly.
"So if he handles the start well on Wednesday [today] we will try him back in the draw on Friday week."
The TAB has Sundees Son a $1.85 favourite in their new pre-nominations markets for the Canterbury Park Trotting Cup, with Oscar Bonavena rated a $2 chance. While the new pre-nom markets are a step in the right direction for TAB bookies, their percentages could do with some tinkering.
The next two steps on the open class trotting path are this weekend when the best northerners like Lemond and Massive Metro resume at Alexandra Park on Friday while the southerners tackle the grass in the Banks Peninsula Trotting Cup on Sunday.