Amity will easily give you an admission there, based on your board percentage. In fact, there are also scholarship programs for you even if you manage 80% in your class 12 board exams.
UPES only accepts JEE marks or UPESEAT marks, which makes it a little tough to get an admission there. There are scholarship programs in UPES also, but you need to prove your mettle in semester exams throughout the year, to qualify for it. Some of my friends have managed to get it 😉
Hope that answers your question.
Moreover, in UPES, you get specialized courses in Computer Science, focussing on various domains, and collaborating with IT giants like IBM, which is another edge you’ll get.
I leave it to you to decide now 🙂