Both are great colleges and have great brand value but i would suggest you to take bits pilani cse though nit warangal is also a great choice but just the fact that bits is almost at par with iits and also it provides great opportunities so it might prove to be a better choice also there is nothing separating the two colleges yet minor factors like fees may play a role in your choice bits has a lot more fee than nit warangal also bits is a private college whereas nit warangal is a government college so choose wisely.