It makes a lot of difference

Talent and skills freely flows when the artist gives his entire self to his work. Drawing from the heart and not from you mind makes a lot of difference.
In my years of  the industry, I have encountered numerous complaints from writers and principals alike ie, the commissioned artist fizzled out in the middle of the project; the writer who hired the artist is unable to pay what has been agreed; delays in communication and deliverable, etc., etc. Call it ignorance or the offending party is just plainly unprofessional. Any individual engaging in collaboration must totally commit the project he/she wishes to undertake, otherwise, he/she should stay away from a proposed project. There are a lot of rotten tomatoes out there and I wish that as they create their own problems, they're going to learn from their mistakes.
I'm the writer and the artist of my GN. You, my readers and followers are my bosses:D