Emma’s burgundy jacket is extremely similar to Neal’s flashback leather jacket. You know what it is also a bit like?
Bae’s Darling Robe .
There are some other instances too of the wardrobe people putting Emma and Neal in clothing that kind of matches. There’s one where she has a purple scarf just like he does.
Neal’s first entrance as an adult also has him in semi-formal clothes (a 3 pc suit) and Emma is the same (a cocktail dress).
Maybe it is the outfit Emma wore on the beanstalk, but I think as with Bae’s Sword it is one of those things where just about anything with Hook sort of connects back to Neal on some level. As Slurpeez said, they’re “foils” in a lot of ways.
Of course, there are many things Emma shares with Neal that don’t really connect back to Hook in any significant way.
“If I had a world of my own, everything would be nonsense. Nothing would be what it is, because everything would be what it isn't. And contrary wise, what is, it wouldn't be. And what it wouldn't be, it would. You see?” -- Lewis Carroll, Alice's Adventures in Wonderland & Through the Looking-Glass