difference between satisfactory and satisfied?

[Tema]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #42 "Consider this", question 3

A ......... customer will always return to the same firm and buy again.

(a) interested
(b) encouraged
(c) satisfactory
(d) satisfied

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #42 "Consider this", answer 3

A satisfied customer will always return to the same firm and buy again.

Correct answer: (d) satisfied
_________________________

what is the difference between satisfactory and satisfied in meaning?

Tema

[Conchita]

Something is satisfactory if it is quite good and causes satisfaction.

If you are satisfied, you are content or pleased.

Unlike the first one, the second adjective isn't normally used to describe inanimate objects.