I own both , a 94 z and a 94 cobra ,the z has way more torque and is alot faster than the 94 cobra,however the cobra is alot easier to modify and you do have to make alot of modifications to make it comparible to the z,the z is a nightmare to work on,the Cobra is fun..the cobra is stiffer but the z is lower and aerodynamically superior...i remember my first ride in the cobra on the highway after drivin a z for the last ten years..i felt up in the air and vulnerable..the Cobra feels more agile ,even though it is heavier..I bought a Cobra cause I started working for Ford and the Svt team at the auto show in Detroit told me to look for a 94-95 Cobra..I did and i bought one and i am modifying the hell out of it....I can tell you that either car is a great buy right now..get one with the lowest milage and put some good meats on it..a word of caution; Nitros has a tendency to warp the aluminum heads on a 94 z-28...have fun and get ready to dish out some money to the insurance company!