There was an obvious clue about who would be chosen as the winner
***SPOILERS***
Right before Anne said "We have reached a decision", she said "They're both gonna have careers in fashion". That last line was IMO a telltale sign that they had chosen Johana as the winner, because Dyshaun already has some fashion experience and he's talented at styling outfits and layouts. So basically they were saying that Dyshaun will eventually find some kind of position in fashion on his own.
But anyway, I was glad to see Johanna win!