Flaked Corn contains about 39 gravity points per pound per gallon.
I'm not sure about rice syrup solids, but flaked rice is about the same as flaked corn.
Of course, you're not extracting those sugars with 100% efficiency.
As to your other question, I highly recommend buying the books Clone Brews and Beer Captured. Even if you're not that interested in cloning commercial beers (I'm not, either), they're highly educational in seeing what the differences are between recipes for various commercial examples of a given style.
Bottle conditioning: Robust Porter
Drinking: Saison Dupont clone, tripel
Coming soon: Columbus APA, Rich Red ale