Croatian Champions have more experience

A pretty good start for Young Boys this season. They won in all 4 games they've played in Swiss Championship proving their title to be more than fair for them. Their most recent game in Luzern's home (3-2) was the first one where they conceded a goal. In the next game for the Cup, they won 3-2 in Biel Bienne's home ( a 4th level team), with many changes in their squad.  

Young Boys participate directly at play offs, while Dynamo Zagreb started their journey from the second qualification round, where they eliminated Hapoel Beer-Sheva with 7-2. Then, they played against Astana and had two wins (3-0 overall). They are also on top of the table with 10 points in 4 games in domestic league.

Young Boys have made a good start this season, but they have never performed in Champions League level, in fact they haven't participated in the tournament's groups before. Contrariwise, Dynamo Zagreb are more experienced since they count 3 participations in the groups the last 6 years. I disagree with the odds which give the lead to the Champions of Switzerland as I think that Dynamo won't be defeated in Switzerland's Capital. X2 would be my choice.