I think Scotty is the most melodic and musically gifted of them all, but he needs work when it comes to lyrics. To me melody is more important than lyrics, cause its melody that makes a song good even when you don't know the language. But Sonyae deserves the win, cause she is good with lyrics, concept, and excellent at coming up with catchy hooks. The previous episode her hook "To the exit, to the exit" is a good example of how to get a song stuck in people's heads after one listen. And catchy hooks are important in Pop/R&B/Hip-hop. Sonyae fits in today's music environment and radio hits, and I can see her writing songs that fits Rihanna, Beyonce, Kesha, Nicky Minaj and Gaga for example. That's why a label would want someone like Sonyae writing for them cause she can collaborates and come up with catchy hooks and hits. She's young and talented, and she stayed focused and worked hard for her win. Good for her.
Jes tried in the finale, and I liked the melody of the chorus of her song, but the rest just seemed all over the place. I see her more like a singer, than a song writer. Or she's more of an Indie singer/songwriter type. And I can see her writing simple/fluffy songs for TV shows or commercials, but not radio hits. I think Johnny that she was romancing deserved the third spot after Sonyae and Scotty, but he screwed his opportunity with his issue with Nick and wrote an average song that got him eliminated. I don't think Brian could have won or make it past top 3. His focus was on coming up with beats and playing the keyboards. He wanted to win so bad though, he would throw others under the bus in front of the judges, but Jess did that to him too and he got eliminated.