Hmmm. I'm not sure. Think the fact he's into stadiums and got the R+L top spot under his belt means he's got more staying power at the top end.
Comparative shout would be Biffy Clyro, perhaps - R+L toppers in 2013, though they never got into stadiums either.
Was just listening to the Sidetracked podcast with Charli and they mentioned that they spotted a brat themed car on the farm recently.
Charli loves to do a little pop up. I wonder if that was a sign no one picker up on?