It mostly comes down to FWD Turbo hot hatch with an economy car chassis vs. RWD N.A. sports car with a purpose built chassis. Both are quick around corners. One has more torque and straight line speed, the other better handling and probably a higher performance ceiling. So ask yourself...
1. What's your driving style?
IF you plan on staying on the street/highways and going fast in a straight line and/or occasionally need to take passengers, the Ford might be better suited to you. IF you plan on going to the track and spending a lot of time driving by yourself, then the 86 would be a better choice.
2. What is your driving preference?
IF you like darting in and out of traffic and do a lot of city driving, then get the Ford. In a motorsports environment the Fords brake activated torque vectoring and FWD could be an issue, so get the 86. IF you prefer your steering to have maximum feedback, FWD won't do the trick and you need a RWD chassis. Etc etc...
To me, that's what it mostly comes down to.