This is the final match, both teams will of course play very carefully at the start of the match to avoid mistakes and if one team is able to take advantage or get a goal in the early minutes of the match it will of course change everything.
Whatever happens in the future, I am sure that this final match will be quite fierce and Dortmund, who are not the favorites, will definitely have greater motivation to cause a surprise like what happened in the Europa League.
European league is very different from the UCL and when Madrid has reached the final round, it is a sign of threat to opponents because Madrid very rarely loses in the final round and Madrid experience can provide a strong impetus to beat Dortmund.
and regarding the two teams scoring early or in the early minutes will not provide any guarantees and if you remember or saw Madrid match against Bayern Munich in the semi final second leg, Munich scored early but look at how Madrid responded with 2 scores making Madrid qualify for the final round.
you can also look back at Bayern Munich match against Madrid in the semi final first leg when Madrid scored early but in fact the match ended in a draw.
Indeed, the previous match cannot be a benchmark for the final match later, but everyone knows that Bayern Munich is stronger than Dortmund and in fact Madrid can still beat Bayern Munich and maybe this will end the same when Dortmund will be defeated by Madrid.
betting options on BTTS is a convenient choice and it will be even more challenging if you use a bet builder to combine several options on one match to get higher odds.