CON-you cant change there exhaust at all from what i was told. Which sucks for some, because i love the sound of turbo deisel with exhaust.

PRO- Twin turbo, Which allowes for low end and high end power.
CON- twin turbo, More maint.

About the design, i was reading an article that the reason the front end is a lot different is because the lower the main frame which is better for crash rating.

ill see if i can find it and ill let you know what else.