As mentioned, you will only get 5pts/$ at an RI, but you will get some free breakfast every morning and some evening food Monday-Wednesdays (some RIs may still provide dinner on Thursday evenings as well.) The FFIs will have some free breakfast as well, but normally don't have much food (if any) in the evenings. The CYs, like FFIs, will have 10pts/$. They will normally have a little nicer lobby and rooms than the FFIs, but normally don't provide free breakfasts or dinners.

One thing to check though is sometimes CY rates can include breakfast. So you might want to check that out as their breakfast tends to be a little more complete than the FFIs will.