Well I'm not sure how accurate the spy's are on this one, but there are definitely some noticeable changes on this car, but most are hidden. It does say that from the A pillars back, the car is covered in current gen Mustang body work, but they do point out some differences on this car....

2015 Ford Mustang mule spotted with production nose

 

VERY cool. I'm really looking forward to seeing the final 2015.

 

Interesting but it seems odd as it was supposed to be a complete redesign and that would be nothing more than a new front end. I wonder what that weird little cannister is on top of the engine.

 

The've been doing that since the SN95 came out. I have pic's in a n old 'zine where Ford had the SN95 front on a foxbdy for a test mule.
They seem to do that when the same/similar chassis is used.

 

Makes sense I guess. Good way to test cooling and those types of things.

 

i remember this from back in the day......

 

That's different!

 

I've never seen that one, pretty damn ugly actually.