Basically, PSG is a strong team, they have many top players. So, they are possible to beat Real Madrid in theory. The problem is how the coach manages a strategy and motivates PSG players to play solidly. If Pochettino can do that, surely PSG strikers possibly make Real Madrid defenders in trouble. Messi, Mbappe, Di Maria, or Icardi look fit to play in the next match, these strikers are enough to beat Real Madrid if they are playing in their best performance.
Yes, PSG's squad quality is much better than Real Madrid's now. Because Real Madrid still couldn't make the transfers they wanted. But Real Madrid are still in a great form these days. They are dominating the La Liga now. And their CL performance also has been fascinating. They really want both titles this season. PSG is a big hindrance for them as long as PSG have their best performance against them. But they are still a capable team to eliminate PSG also.
Currently, both team are level in quality and performance because both have same rank in their respective leagues and in Champions League performance is also very good with we can't predict about winner in meantime this is going to be one of the toughest competition in knock out stage with most lethal attack of Mbappe, Messi and Neymar will be ready for facing Benzema and company under leadership of Italian legendary Ancelotti who can turn tables into his favor with standing on sidelines.
But, sadly we have to wait for nearly two months for this match which is not easy as during this time many theories and conspiracies will be happened but still it's one of the best match to watch.