But Def Leppard singer Joe Elliot insists he's not fussed about taking to the stage tomorrow after US rock gods Mötley Crüe...
Because he always believes that his own band is best.
Crüe are promising to deliver a spectacular show, bringing their rollercoaster drum set-up, which places sticksman Tommy Lee on a 360 degree trip while he performs a solo.
Joe said: "They can bring out 16 of these rollercoasters, we'll do our thing and people can make their own mind up.
"If an audience is more impressed by Tommy's drum riser than our songs, that's their choice.
"We're going to play songs that are embedded in our fans' DNA, and if Mötley fans dig it, then great.
"If they don't, they don't – there's nothing you can do about it."
The talkative Joe admits his runaway mouth got him into a little bit of trouble a couple of years ago, when he was accused of putting down other acts.
But for Joe, those statements were simply a sign of his faith in his own band.
"I was saying we're better than everybody and I have to think like that – if you're a boxer you can't get in the ring thinking you're going to lose this bout," he explains.
"I don't care who we play with – I've said this to Nikki Sixx's face and he agreed, as he thinks the same about Mötley.
"You don't go out saying we're rubbish and mediocre. Who the hell would bother coming to see you?"
One advantage for Def Leppard, of course, is their number of hits, with the likes of Rocket, Pour Some Sugar On Me and Let's Get Rocked in their arsenal. Many of those tracks can be heard on this year's Mirrorball, their first live album.
But the group decided to chip in three new recordings as well, to keep things fresh.
"Our record deal was up, so we didn't have to come up with 12 brand new songs," explains Joe.
"We wanted to get off the treadmill of tour, album, tour, album as it's self-destructive and everything we do on an album will be compared to Hysteria.
"It's an albatross because it's never judged on its own merits. So we thought let's go back to when we started, and did a three-track EP, which got a lot of exposure and showed three different sides to the band.
"We wrote them the way we wrote Hysteria, just writing, rewriting, then moving on to something else."
Moving on, Glasgow is always a pleasure for the group, who originally played the Apollo in the 1970s.
"It was one of those gigs like the Hammersmith Odeon or Madison Square Garden, that had to go on your bucket list," he says.
"We had the huge honour of opening for AC/DC on their Highway To Hell tour in 1979, doing two nights at the Apollo.
"Watching that balcony and thinking it would collapse ...you become attached to a town just by an incident like that. Something like that, you couldn't wait to get back."
n Def Leppard & Mötley Crüe, tomorrow, SECC, £45, 6:30pm