I don't think so that there is any other competitor of PV on zee as it have very matured story line as well as a reunion cast and very different love story as well ..so no any other show full fill all that aspects so how can they compete it...
ok firstly... PV has got a very good... as in VERY GOOD story... secondly... it has a message that is being delivered... thirdly... it has a very strong script writer... fourthly... it has got a very very wonderful cast... finally... it has got a very good production house...
i think i have given you all the reasons for the long run and success of PV... and if you are talking about the rankings of PV on IF... it depends on us fans... how much active we are...