Yes, they are different loan programs. FHA requires a 3.5% deposit. Both loan programs use similar requirements in terms of the condition of the property. The CDA loan program has stricter debt to income ratios but also gives an additional loan for closing and downpayment monies. You can find additional information at http://www.mmprogram.com/
CDA is usually used in conjunction with an FHA loan. There are additional qualifications and class requirements. If you would like further information, I have a loan officer who is well versed in CDA and FHA loans who could answer all of your questions for you.
Please let me know if I can help you further.
Keller Williams Excellence Realty