Very similar games, game dev tycoon is a little more in depth. This is more of a fast paced micromanaging sim like the other. I originally played it on Mobile and I highly recommend it tho I am biased.
I've played both games but by the time I got to game dev tycoon I couldn't stick with it the way I could with game dev story. You can probably finish this game in 2 or 3 long sessions.