The pony projector mirrors come on all premium package cars. And that is my wife's favorite thing on my MCA Edition.
The Pony Package as originally introduced in the 2006 model year included a lot more upgrades (basically it got the GT suspension for example). Now it is more of an appearance package - but it is a nice upgraded look. I like the Pony grill better than the base grill; but I went with the MCA Edition package this time because I liked that grill better, and I already had a Pony package car.
You can see the Pony grill in ninefooter's sig - I need to update my sig with the new car but here is a picture of the MCA front end. Other than different embroidery on the floor mats (rather than pony mine say Mustang Club of America); the side stripe on mine is similar to the GT/CS, fades out toward the back and says "Mustang Club of America" in it; gray wheels rather than chrome; and no fender badges probably because of the stripe; the two packages are the same.