If they are both close to each other you could try a Chindian where you get the starters from the Chinese (spring rolls, crispy aromatic duck etc) then have an Indian as your main course. Best of both worlds. If it had to be one only then Indian every time for me. I once found my granny covered in nuts, when I asked what happened she said "I'm your peshwari Nan" Sorry, I'll get my coat.
I was in a Chinese restaurant and I said to the waiter "This chicken is rubbery". He said "Fang you velly much"