I don't think John and Zatanna's finger-tip sex or Shade's lonely freak-outs would've been any more finger-sexy or lonely freakier if it'd had a Vertigo stripe down the side of the cover.
But, then, some of the most "Vertigo" Hellblazer, Swamp Thing, and Doom Patrol weren't actually Vertigo runs. For me, the banner, the imprint, that's what feels like a sell, a gloss, more than anything.