Wales had Turkey and Croatia as opponents in the group stage, so 3rd place and qualification for the play-offs can be considered a good result for the Welsh. Although, if Wales had not lost points in the games against Armenia, they could have beaten Croatia in the group.
Finland's group stage went without any sensations, it would have been difficult not to get at least into the qualifying round (for this it was just necessary to pass Northern Ireland and San Marino in the table).
Wales in this pairing looks preferable, all the players of the team play in the English Premier League or in the Championship, which are clearly superior to the level of players in Finland.
Prediction: Wales to win. We recommend the “1 Win” bet, odds 1.89