I will bet on PSG to win, they have a team that looks hungry for this competition under this new manager to win it for the first time. The coach also has the experience and PSG attackers are very fast and deadly. PSG plays well in the first half of games and if they are able to score their goals in the first half, they could switch to a defensive strategy in the second half and try to stop Inter Milan from scoring. If PSG wins, will Ousmane Dembele be the candidate for the Ballon d'or?
Although with the way PSG's performance is going currently, they can win the Champions League trophy against Inter Milan. PSG's current performance is better than Inter Milan's own, and with the way things are going now, seriously, I think Inter Milan may find it difficult to win the Champions League title. However, as you said already, if they are able to score in the first half of the match, they will definitely change their tactics.
furthermore, both teams will even do the same thing, both Inter Milan and PSG. Anyone that scores a goal first will definitely change the strategy of how they are playing. Both teams are hungry to get this trophy this season, especially PSG; they will definitely do everything possible to win the final.