@ nikhil
what u need to understand is that , both of the courses are good – ECE and cse and with that u are in a top notch engg college that is nit warangal .
i could recommend cse for that , go with cse , u have enough potential to crack upsc i could think that .
and abt the comp[arison , UPSC service are far better good than a private engg beacuse they are govt , even govt jobs are always good than private if the salary will not matter here .
so, better go for upsc preparation , but REMEMBER – donot ignore cse study also , otherwise u will face a serious problem in nit ,
that is papaer back in the semestar .
so, if u can focus then focus on both – its a little bit difficult thing , but i am not saying impossible .
otherwise focus on cse only , u have ample time to give upsc after pasing out from nit also .
ALL THE BEST .