3i has a 2000 cc engine. 3s has a 2300 cc engine, based on a 2008 brochure. It also has some other standard features that the 3i
doesn't have.
Mazda's seem to rust out quicker than some cars, my 2008 doesn't have good under body protection. I live in NC where we don't
have a lot of salt plus I'm retired and can leave the car in the garage when we do have salty conditions. I suppose adding some
undercoating may help if it's applied correctly.
My car is copper red mica and I like it, true red was also used for 2008. I guess the color is subject to what people like, I probably
wouldn't like the true red as well as copper red.
Clifton