There's a difference, of course, but I think, Michel is quite right.
This thread is about a
fictional fighter, but surely it has characteristics
of designs, that were known then and probably regarded the way,
aircraft would look like in, say, 20 years ?
The artist probably know about the N-9M and maybe about the Boeing
design, too. He just mixed, what he found to be looking best.
Nowadays artist impressions of "future fighters" probably often are
made the same way. A bit of Lockheed and Boeing stealth features,
a bit of Starwars and maybe, if the artist is old enough to remember,
a bit of Colani ....