Jeina looked better than she was previously. It was a common black long sleeved dress instead of her creamy white corset brothel dress. Loki would obviously be in his armor for his formal look. Maleficent wore a much bigger and elegant dress of black. 

Maleficent's Dress 
[img]http://www.arrayedindreams.com/wp-content/uploads/2014/05/mal41.jpg[/img]

Jeina's Dress
[img]http://www.mendaily.com/wp-content/uploads/2012/10/Megan-Fox-Alexei-Hay-Photoshoot-10-832x1024.jpg[/img]