I'm sure the RF speakers are better... the stock speakers are just paper bottom rung stuff. They wouldn't be able to handle much power or deliver much midbass.

I don't think the base model rear speakers are coaxials... they appear to be the same as the fronts, which have a separate tweeter. They also don't have crossovers, so get full range front and rear. They have this little paper cone shaped ring at the center, but it's not a separate coax. The RF probably has them coax in back.

I'd ask the dealer explicitly what this "sound deadening" package includes. I would be suprised if they tore off interior panels and applied sound deadening material... but maybe for the right price