What is the difference between 满足 and 满意?
满 = to fulfill; to satisfy
意 = mind; intend; desire; idea
满意 = be satisfied (of a desire); happy with

Example:
希望我們的服務能使你感到满意 = Hope our service can make you feel satisfied  (happy/ satisfied in your mind)
我們已經給你最好的服務，還不满意? = We have given you the best service and you are still not satisfied? (unhappy/ not satisfied in your mind)
我們已經給你最好的服務，還不满足? = We have given you the best service and you are still not satisfied? (still want more)
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足 = enough
满足 = 1. to satisfy (a need) 2.  be satisfied  (of one's need)

Example:
每小時十五美元的工資無法满足生活需求 = A wage of fifteen dollars per hour cannot satisfy/ meet the cost of living
非法民工有七美元一小時的工資就很满足了 = Illegal migrant workers are satisfied/ content with a salary of seven dollars an hour (a need is satisfied/ don't feel needing more)
非法民工有七美元一小時的工資就很满意了 = Illegal migrant workers are satisfied /happy with a salary of seven dollars an hour (a desire is satisfied/fulfilled)