You have got a pretty decent score @
pns and yes, you have a good chance of getting civil, chemical etc in Pilani.
Now first of all you need to decide what you are passionate about, if you feel, CS or ECE is the right branch for you then you must not take admission in any other branch because you will then keep on cribbing for the rest of your life.
Moreover, BITS Goa & HYd are good colleges in their own right.
If you talk about Pilani, and why it has higher cutoffs, then the simple answer is, that it is one of India's oldest and a premier engg. college, ranked higher than most IIT's.
Only the degree doesnt matter dear friend, we have a very strong alumini base and all the top companies visit our campus for recruitments.
But then, I would reiterate, BITS Goa is also a good college and you have a pretty solid chance of landing up a CS or an ECE seat there.
So i believe you have to decide between College and branch here!
let me know if you have any more questions....