BLOG 2A.
How do we decide if we are rich, smart or short? One way is through social comparison. We tend to define ourselves and compare ourselves with others to feel good about our own selves, and some other times, feel bad too. So if one person wants to feel good about themselves they'll probably compare themselves with people who are comparatively beneath them, and people who want to feel bad, they compare with people who are above them in certain areas, it can be socially, mentally, or maybe in wealth. In my opinion comparison in any manner with anyone is not a good idea. It can easily throw you too a darker side, which is pretty hard to come out from. A few people go into depression because of the same reason. There has been various studies, for instance there has been a study of people who have been facing marital dissatisfaction, the relationship between their feeling and social comparison, negative or positive, regardless has had a negative impact. Comparison in general is not fruitful. Even when it comes to parents, parents tend to compare their kids with other children, even if they intend to just create that sense of competition among the kids and there's no other negative motive behind it. Without realizing the fact that it might hurt the child or they sometimes demean the kid unknowingly can leave a great impact on the kid, which certainly is not that positive. Mostly, Kids end up feeling bad about themselves resulting in degradation of scores or not talking a lot like before. It can be anything. Social Comparison is not entirely a bad idea as there are perks too. Some people do take it positively and strive to grow for example, the same parent, treating the other kid in the same manner might boost their confidence and do end up creating that sense of competition which is good for the kid, which does motivate the kid to do well in all aspects. It all comes down to how you perceive it.  

Sources: https://www.ncbi.nlm.nih.gov/pubmed/2283590
http://www.beingtheparent.com/stop-comparing-your-child/