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.
The goal of a horizontal merger is to create a new, larger organization with more market share. Because the merging companies' business operations may be very similar, there may be opportunities to join certain operations, such as manufacturing, and reduce costs.