STD, DX, Differences?

Ok, as far as I understand it the cars have the following

STD - Base Model
Vinyl Seats
70 HP Engine

DX Adds
Cloth Seats
92 HP Engine
Rear Windshield Wiper

What else am I missing, I am just curious as to what the differences are between the two.

eh the dx doesnt have the rear wiper, thats the si

then how come i have one?

I was thinking of the rex

my dx doesnt have one.....