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 occurs when two companies join forces to become one. This may happen for a number of reasons, including elimination of a competitor by buying it out, pooling resources for better productivity and improved profits or combining complementary technologies to make it possible to access a new target market.