I can't answer your question directly so in the event you don't get a better answer on the Forum, here's what I suggest.
Get 2 or 3 estimates from the concrete pros to do what you'd have done at a minimum. (Say, maybe you'd want just a poured concrete deck around the pool.) After that estimate, call the pro back on the phone and ask if he can take the 1st estimate and quote you with what it would cost for your 'dream' pool deck. After you get the estimate, ask why it costs so much more than the 'basic' decking. Other than suggesting this, I'm of no help.