If you will choose to attend this school if they offer you more, then you can say so. (E.g. you are my top choice program, but the funding is not sufficient.) If you're just curious but it's not your top choice, don't waste anyone's time.
Funding shouldn't be the deciding factor... as long as it is a sufficient amount, go to the place that is the best fit for you. In the long run, that will matter more.