There seems to be a lot of confusion in this topic.
Here's the full image. As you can see, there are concept images of the various characters, two of which being Julius (young and old). Simon concept is on the upper left, while Juste is on the upper right.
That's the concept of Trevor, just in case anyone was wondering.
All the Belmont's look similar, but each still have their own distinctive traits contrary to what others want to believe.