From someone who has had a Fox, and now an SN95, I'd personally say get the SN if you want more creature comforts. Everything mechanical from the two is interchangable for the most part (suspension, engine, brakes, etc.), but the SN has better seats, 5 lug, 4 wheel disk brakes, ABS, R134a in the AC (so you can actually get a hold of some refrigerant), you can fit wider wheels on the SN, it has driver and passenger air bags, better computer (once tuned, but some will debate this all day and we'll still be at the same place we started from), better handling, and a stiffer chassis. The con is that they do weigh more than their Fox counterparts, but the additional things I mentioned make up for the difference in my opinion. Now if you want to go balls to the wall, get the Fox. They're lighter, there's more on the road, so parts are cheaper, and there's more room in the engine bay to work on them. Not to mention all of the SN parts will fit on them to make them handle and brake every bit as well. This is of course my opinion, but it's unbiased because I have had both. And one thing that rigamaroles mentioned is daytime running lights. No Mustangs sold in the USA have them, so unless you're in Canada, that's a non-issue.