That meaning is one common element between clubs with an awful lot of contrasts; contrasts that only add to how compelling this game is, The Independent reported.
For both, this is about much more than the relatively mundane aim of getting off to a good start, stating a claim to win the group, and all the rest of that.
Liverpool wants to live up to last season, to show it is still escalating as such an exciting side, and that a club with such a Champions League history can compete amid the economic realities of the modern game.
That is an economic reality, of course, that has effectively been set by PSG. Its record purchase of Neymar remains the landmark move that has had the greatest and most influential effect on the transfer market, and the club game.
The French champions want to live up to that Real Madrid-Barcelona level they so aspire to, to show that theirs is more than just an ostentatious but ultimately empty project, that there is substance to it; the substance of that grandiose silver trophy.
It is also that issue of substance, of a team having heft and authority, that suggests another contrast between these sides – not least the managers, who offer similar parallels.
Jurgen Klopp has so clearly made Liverpool more than the sum of its parts, gradually and forensically improving the team through highly-specific signings for a defined style of play.
To say that hasn’t been the case at PSG would be an understatement. There has been a vague sense of ‘project’, but mostly only defined by amassing an expensive group of players. It’s only a year since Patrick Kluivert was director of football, and that was when the club was already well into this spell of appointing very different manager profiles.
It didn’t help such perceptions that PSG can seemingly win the French league in second gear, with Neymar not even having to show he is a first-rate talent.
Klopp pointed to how, unlike Liverpool or pretty much any Premier League top-six side, PSG could rest the Brazilian and Mbappe for a league game and still win 4-0, as it did against Saint-Etienne on Friday.
“We watched the game last night," the Liverpool manager said. "They were good, but it was not too important because two of the main men were not involved. But we will analyze them, we started already a bit, so we try to be ready, but they are really good, so that's interesting. I don't see the pressure or whatever for us. People say we were last year in the final so this year we have to win it, come on. So we play against PSG, that's a very interesting football project.”
And this also an interesting dilemma. Figures around PSG admittedly do insist all this is starting to change, and there is now much more intelligent direction, as signaled by the appointment of Thomas Tuchel. The idea is he can give the Parisians a focus and attacking tactical idea that has been lacking.
This, however, might just pose another problem.
Given the indulgent culture at PSG that so many reports have detailed, and particularly that around the Brazilian superstar, the thought of Tuchel attempting to point out specific counter-pressing positions to Neymar is almost comedic.
And there should be no doubt that is precisely what the German will do. As one figure who knows him well attests, and so many in the game say he’s famous for, “he won’t treat the first guy on the team sheet any differently to number 25 in the squad”.
This is why things ultimately went badly for Tuchel at Mainz, and at Dortmund.
It is far too early to talk about that with PSG, but almost the main point of interest about its season is how PSG will cope with that intensity, in a situation when it won’t actually need it until February and the Champions League latter stages.
That is why this match against Liverpool is a good one to open the Champions League. The electricity around Anfield on a European night will be a jolt, and one of those they’re going to need at intervals over this season.