Envy, jealousy and schadenfreude
See also: Jealousy#Comparison_with_envy
"Envy" and "jealousy" are often used interchangeably, but in correct usage they stand for two different distinct emotions. In proper usage, jealousy is the fear of losing something that one possesses to another person (a loved one in the prototypical form), while envy is the pain or frustration caused by another person having something that one does not have oneself. Envy typically involves two people, and jealousy typically involves three people. It is possible to be envious at more than one individual at any given time. Usually envy involves wanting the beauty, wealth, or socioeconomic status of another individual. Envy and jealousy result from different situations and are distinct emotional experiences. Both envy and jealousy are etymologically related to schadenfreude, the rejoicing at, or taking joy in, or getting pleasure from the misfortunes of others.
Aristotle (in Rhetoric) defined envy (φθόνος phthonos) "as the pain caused by the good fortune of others", while Kant defined it as "a reluctance to see our own well-being overshadowed by another's because the standard we use to see how well off we are is not the intrinsic worth of our own well-being but how it compares with that of others" (in Metaphysics of Morals). In Buddhism the third of the four divine abidings is mudita, taking joy in the good fortune of another. This virtue is considered the antidote to envy and the opposite of schadenfreude.
everything else is just opinion.....but then again even experts are just expressing their opinion.