Moving on to another similarity, the fact that both Simons have a bare right shoulder.
The Conan-Simon is wearing a breastplate with left shoulder pauldron, which is appropriate armor for the time period. The right pauldron is missing, however. We can assume this is because it was lost or damaged in battle, or Simon in acquiring armor for his adventure wasn't able to get a breastplate with both shoulder pauldrons intact.
The Chronicles-Simon is not wearing a breastplate with shoulder pauldrons, but instead he is wearing some kind of apparel with a fur (feathers?) covering of the left shoulder, and that attaches at the collar of his neck in a stylish buckle. The right shoulder is left bare, not because a piece of the armor is missing, as is the case with Conan-Simon, but instead its because that's what the outfit is designed to look like. We can only assume that the fashion designer responsible for Chronicles-Simon's outfit left that spot bare intentionally, because Simon's right shoulder is just too damn sexy to be hidden from the world.