cars are FAR too old to compare without a TON of information..
are you trying to buy ONE of these and trying to figure out which is better to buy? if so you need to tell us the following..
* location of both cars
* approximate age of both owners.. male female?
* mileage, and asking price, modifications in detail..
* vehicle maintenance history..
* run a carfax report
* what you plan to do with the car ultimate goals..
just too many variables.. the SI might be beat to s**t owned by some 20 year old idiot who bounces the thing off of the rev limiter every chance he gets.. OR maybe not..