Which airplane is this lego model?
To be perfectly honest, LEGO does have a habit of mashing similar airplane designs into their own models. The twin-tail airplane has most of the features of the F/A-18 with its trapezoidal wings and slanted, trapezoidal vertical stabilisers. The F-14's contribution to that design is mainly in the engine intakes.

The single-tail airplane has most of its design from the Saab JAS 39 Gripen but the vertical stabiliser looks like it comes from the Dassaut Rafale (Knowing LEGO pieces, it could also be that they couldn't find a proper piece to fit).

Of course LEGO also has this unholy mash-up of the F-22 and F-35. So it does not surprise me that they have multiple plane designs in these airplanes.