In all fairness, GW's plastic greatswords are a lot like that prototype in sculpting/casting quality and aesthetics. Greatswords have some ridiculous swords and fantasy features, Pro Gloria's prototype is simpler and more restrained.
Add some comets and skulls and it could have been an empire soldier had they been sculpted in conjunction with the GS plastics, and not four years earlier by what I can only assume to be a chav who got paid in bacardi breezers instead of UK pounds.