they all weigh about the same amount, a fat person could make an s13 weigh more than an s14 with a skinny driver. its the balance that'll kill ya in these cars. the s13 is ass heavy, the hatchback is really ass heavy, and the s14 is nearly 50/50. an rb will pretty well balance an s13 and an sr will make an s14 front end light, and you will be able to notice it in both cases.