I'm with Retro,
the concept drive chain is on the opposite side
the concept monoshock is at a significantly different angle
the concept bike does not have a radiator (looks air cooled, but who knows)
the concept bike looks carburetorated, and the intake manifold is at a significantly different angle.
a lot of other detail around the forks, handlebars,sump, valve cover way different.
I can't tell what bike the artist started with on his Photoshop, but I do not see the 919 in there.
No offense
just saying
from my point of view
in my humble opinion...