This is arguably an application of so-called "Dark Patterns"; the black hat of UX design. The red colour, the suggestive copy are all chosen to invoke a sense of urgency. A List Apart has a good article on the subject: http://www.alistapart.com/articles/dark-patterns-deception-v...
I think the theme of false urgency/scarcity is the main annoyance of the Cleartrip presentation. The rest of it is just a matter of Cleartrip displaying few seats for a narrow price, vs MakeMyTrip displaying more seats with a wider pricing range.
