If Romania had only watched the match against the Netherlands, maybe we would have thought that the Netherlands were top of the group and Romania were one of the best third-placed teams, but the opposite is true.
Holland has experienced backbones like Wahkil Yundjak and Divijic who won't leave much space for the Romanian strikers, but the team often lets all its players organize the attack, and an overly open style could spell trouble for a pair of backbones.
That said, I think the Dutch striker has the ability to create a numerical advantage for his teammates and give them a chance to score, with Diaby's brilliant shot against Austria being the best evidence of this. Also, Gap is a player who has impressed me with his two goals in this week's Europa League final.
Romania are a very tight team with defensive counter-attacking players and the fact that they topped a pretty difficult group shows that they have fight and quality. However, they do concede a lot of goals and Holland are certainly capable of getting into their goal, so I think Holland will only win promotion.