As adjectives the difference between custom and tailored
is that
custom is made in a different way from usual, specially to fit one's needs while
tailored is adjusted by a tailor, fitted.
As verbs the difference between custom and tailored
is that
custom is (obsolete|transitive) to make familiar; to accustom while
tailored is (
tailor).
As a noun custom
is frequent repetition of the same behavior; way of behavior common to many; ordinary manner; habitual practice; usage; method of doing, living or behaving.