No, the Earth would not have the same gravitational effect on the giant as a cue ball would have next to us if the giant were proportional to Earth's size compared to us and the cue ball.
The strength of the gravitational force depends on two factors: the mass of the objects involved and the distance between them. In this scenario, assuming the giant is proportional in size to Earth compared to us and the cue ball is proportional to our size, the mass of the giant would be significantly larger than that of the cue ball. The Earth's mass is about 81 times the mass of the cue ball.
Since the giant's mass would be much greater, the gravitational force between the giant and Earth would be significantly stronger than the gravitational force between the cue ball and us. The larger mass of the giant would result in a much stronger attraction between the giant and Earth, making the gravitational effect much more substantial.
In other words, the giant would experience a much stronger gravitational pull from Earth compared to the gravitational pull we experience from the cue ball.