Car designs are never one-off and one cannot say who stole from who. There are aesthetic features that are commonly liked so they are frequently shared by different designs. The same goes for human facial features of which certain types are sought after and even surgically created.The NSX shares many styling cues from the Porsche 959 and the Testarossa. The Honda HP-X concept was designed by Pinnifarina. In fact, the NSX font is actually a minimally modified PORSCHE font which, at least to me, evokes senses of performance, style, and class. The MID 4 II pictured got a little of many things from the Porsches and Ferraris too but the overall design looks crappy IMO.
Steve