1 Hourglass: Torso and hips are approximately the same width - with waist definition.  Apple: Torso and upper body wider than your hips - with little or no waist definition. You might have weight surrounding your waist.
From a legal point of view, a merger is a legal consolidation of two entities into one entity, whereas an acquisition occurs when one entity takes ownership of another entity's stock, equity interests or assets.
A merger between two firms involved in the same business but on different levels. As an example, an automobile company may purchase a tire manufacturer or a glass company. The merger permits the firm to gain more control of another level of the manufacturing or selling process within that single industry.