Comparing the current state it only seems that Manchester City look better, but in reality it is hardly so and I admit that they can lose or draw with PSG in the Champions League. Yes, there are more chances of them winning, but given their instability - I wouldn't be so confident of them winning. Besides, PSG realise that a defeat for them will most likely mean elimination from the tournament and will fight to the end
Both PSG and Manchester City are in an uncomfortable situation in the Champions League. If PSG is very eager to win the Champions League once and then the trophy will be stored in the cabinet, then it is very unlikely that PSG will give up amidst Manchester City's unstable conditions this season. This match will be used well by PSG because PSG will act as the home team and for both of them will play the game in their best form so that it will not be remembered by many fans if they become a team that fails when the new Champions League format is implemented.