angularjs - Is using $watch better than using $on and $broadcast? -

if want call function in controller when make changes in different controller, use $on , $broadcast.

however, i've started using $watch more recently. now, have variable in service, example this.shouldireload = false. whenever make change(for example, deleting item in modal), change value in service, , using $watch, can call reload function in controller. works.

which way better? pros , cons of each?