There are more EX's than SC's because the EX's came out in 03 and the SC's not till 07.
I think most people still prefer the newer EX's because they speak more for the utility of the car than the SC does.
I guess it's just preference then. I know the SC comes with front and rear carpeting (front of passenger seating) but rubber mats should take care of that issue. I don't know if the seat fabric is as durable, water resistant, etc. in the SC as it is in the EX. One thing that drives me crazy in the EX is the lack of a console for storing leashes, collars, collapsible food and water bowls, water bottles, etc. I also like the idea of charging my phone inside the console instead of over the dash. I especially love the usb port in the dash. I don't need a cooler because I keep a travel refrigerator in the car which acts as my cooler if I need it. In the EX it makes a perfect console/arm rest. Fits perfectly between the seats with one arm rest up.
So, I guess what everyone is saying is, it's purely a matter of taste, though the EX is more conducive to dogs; no carpet to deal with. Sure wish they'd just moved the sun roof to the front instead of eliminating the whole thing.