I'd add Hargam to the list of good British juveniles. I was very taken with how he travelled in the Triumph and given he's a speed horse I was amazed there wasn't more comment about McCoy's aggressive ride.

Thing is horses tend to improve a fair bit between 4 and 6 yr old, and at varying degrees, so its not cut and dried which of the 3 would be the better Churdle prospect at this stage.
yes,we can all have an opinion,and mine fwiw is that going on what my eyes have seen is that they are all pretty evenly matched if they are given their preferred ground.
They all looked impressive during the season when they had their ideal conditions.
The Triumph unfortunately had ground that went against Hargam,but he ran a good race considering,beating a few that people fancied before the race,and their was little between Peace and Top notch.
To my mind its very difficult to say for sure which of the 3 would be the more likely CH winner of the future.

In response to the original question, The New One was 100% unlucky two years ago.

He got caught up in another horses mistake through absolutely no fault of his own, which at the very least made his task a hell of a lot harder.

Compare that to Zarkandar this year whose mistake was all his own work, so he was no way unlucky.

Whether you think The New One would have won two years ago is another question, but he was very unlucky.

Of the three juveniloes I think Top Notch would be the one inconvenienced by the old course and half a furlong less. He got the ground that was against the other two and he still couldn't win. Grand horse that he is I think he could be going up in distance and may see a fence sooner than later.