Just tried. It processes the escape first and then finds the path with it. Essentially, making it look into a directory made by the characters before the /.
In the first one, the backslash is not the escape character, but part of the text.
Turns out Dolphin just replaces the forward slash with U+2044 “Fraction Slash” character, hence, not requiring any escape. I’d call that cheating, but it works well.