Please help me with this!?

Domestics are used to human contact, therefore they are generally not afraid of human approach whereas a feral has learned that human contact probably is going to mean abuse so they run scared. Domestics don't have the worry of hunting for food, it turns up in a bowl, ferals have to hunt for every morsel so a great portion of their day is spent foraging for food. What a domestic does as play, a feral must do to survive.

It does also depend on the type of animal. For example I would suspect that a feral cat and a domestic kept cat probably behave by and large in a similar fashion as cats are less 'domesticated' generally than a domestic dog whose behaviour has been modified extensively over many years of association with humans. My own cat, although pedigree and never having had to fend for a second on his own would probably adapt pretty well should circumstances demand it whilst a dog would simply not cope if he had to face life without human support.

HTH