Your preference is the one that matters. I think the width of each of the II letters should match the width of the vertical strokes in the PAYLOADER letters themselves so it appears that the typeface matches. Those in the picture look like the II letters are bolder or wider than the other letters.
They do have the II in the old catalogs and facecards, but did any of the decal sheets actually have the II on them? There may be different versions, not sure.