When Du make Liebe Du involve feelings, LOVE, passion. When Du have sex Du just have sex, without Wird angezeigt your feelings for the person, with no affection, with no sweet words oder whatever, that's just sex.
Well both are pretty much the same. Making Liebe can be also be Küssen and caressing other than intercourse and it also can be others like oral sex and anal sex (especially for Lesben and homosexuals).