I think the difference is there is no political agenda to those programmes, they are mostly edited to entertain and fill air time in the cheapest possible way under the title of "reality."
The difference is one is usually highly educated and empowered, with financial independence and mobility but you are right both are crass generalisations.
Excellent BBC lecture on the subject.
Owen Jones argues against what he sees as a growing strain of malevolent British TV programming denigrating the working class.
http://www.bbc.co.uk/iplayer/episode/b03jrw5l/Royal_Television_Society_Lecture_Totally_Shameless_How_TV_Portrays_the_Working_Class/