In his take on it, Klavs mixed various real world planes to do the Morningstar. The vertical stabilizers are definitely from MiG 1.44, but other elements are pretty different. One of the features specific to Klavs' model is the "inlets", that come from the Rafale, as do the inner hardpoints shown. The engines are really distant from one another in Morningstar's models, whether from WC2 or from Klavs, which is more akin to a Sukhoi design, either Flanker series or T-50. The leading edges definitely come from F-22, to which canards have been added. The wings are the biggest difference top-down, IMO. The MiG 1.44's are delta while the Morningstar's are swept wings, a bit reminiscent of the F-4's. For the canards themselves, MiG's are, like Gripen's and Rafale's, close-coupled canards placed a bit higher to the main wings' plane while Morningstar's are in the same plane (and do not seem to be mobile either). The engines are very visible from the top, which feels very much like MiG-29's engines, though in Klavs' model with a much more modern take, to include the S-ducts designs used to reduce frontal RCS. Here, the original Morningstar and Klavs' for comparison with the MiG:
The Morningstar's design is one of the closest you'll see to a modern real world aircraft design. The only real mistake I would point would be the canards' positioning, which should be slightly above the wings though still in the same position to said wings.