I don't think Jason meant it that way. He was just saying that it's not uncommon for designers to have cars they design look similar to one another. Clients often reference other cars out there that they like when having theirs designed, so sometimes that happens. It's not necessarily a sign of a bad or redundant designer, just a popular design.
Good work Jason, I saw that car at SEMA but didn't know it was your design at the time.