I touched on this difference during my September talk where I illustrated the arms of Winnington and their Leftwich descendants.
The Winnington blazon is recorded as being an orle, that of Leftwich is an escutcheon voided. In the illustration above they look the same.
Definition of an orle: Like a bordure but not reaching the edges of the shield.
The blazon of the Winnington arms (Visitations) states “an orle” – which – when illustrated on a shield looks like an escutcheon. However, in the illustrations of a quartered shield as shown above perhaps an orle ought not to look like an escutcheon but follow the edge of the shield. Imagine an orle on a banner; it would be rectangular and look nothing like a voided shield.
Above is an example of how an orle should be illustrated on a quartered shield when following the definition "like a bordure but not reaching the edges of the shield".