Except that the criteria you have given don't make any sense. Knights and men-at-arms at the time were wearing different types of heraldic robes over their armour so it wasn't really possible to recognize what kind of torso protection are they wearing. The only elements of armour that could be used to tell them apart would be head and limb protection and shields. Now, I don't think that limb protection is very noticeable with this kind of graphics and scale. Helmets... well maybe? Shields would be the most noticeable difference but there weren't that huge differences between shield types across the XIV century (except the end of the century when most shields were abandoned by knights). In the XIV century differences in shield types used were more noticeable between different geographical regions rather than by dating.
The only thing that did change a lot during the XIV century was the styles of heraldic dress but I really doubt that anyone would notice these differences besides historical reenactors like me.