The Accountant: You should dress and act to attract the type of women whom you want to marry. If you want to marry a girl with yeshivish hashkafos then you should act and dress like someone with yeshivish hashkafos. If you want to marry someone with totally different hashkafos, you should dress to attract that other type of girl.
Obviously, regardless how you dress/act you should be straight up with both the girl and the shadchan of which direction you want to be heading.