There is absolutely no difference in suspension between an EB and an EB with appearance package. I am not exactly sure what you are calling a "Sport" package, as I am unaware of one and can't find it in any brochure. And EB with Appearance package came with 20s. Can you give me a link where you are getting your info?
Here is a link to a 2011 Brochure AND 2012 Brochure - see page 13 for the detailed content of the appearance package. It is all aesthetic - all appearance. I have a 2010 brochure at home and it is the same in substance.
2011:
http://www.autoevolution.com/pdf/auto/lincoln-mks-brochure-2011.pdf2012:
http://www.drivingforceauto.com/LiveSite/brochures/lm/2012/mks.pdf (see page 13).
For those that don't want to click, here is the info cut and pasted:
AVAILABLE LUXURY PACKAGES
EcoBoost Appearance Package2
Body-color license plate accent
Chrome grille with darkened accent bars
Darkened headlamp treatment
Decklid lip spoiler with chrome insert
Modified MKS decklid badge (S in red)
Ultimate seat trim featuring color-keyed Tuxedo stripe in the center of the
front and outboard rear seat backs, and embroidered Lincoln Star on the
front seat head restraints (available in Charcoal Black with Charcoal Black
tuxedo stripe, or Sienna with Charcoal Black tuxedo stripe)
Unique 20-in. 10-spoke polished wheels with P245/45R20 all-season tires
Unique body-color front and rear lower fascias, side rocker panels and
door cladding
Unique illuminated door sill plates (S in red)
Unique metallic appliqué with MKS on instrument panel (S in red)
Upgraded black floor mats with embroidered Lincoln Star