That may be an Ottawa thing, here in Toronto there are lots of gunite pools, we have one, I have not seen one in a long time, that isn't gunite, except a guy on here, near Newmarket. I would expect the costs to be fairly similar, you still need to dig a hole, run plumbing, run gas and electric. put in some kind of support structure. It may be a question of a contractor preferring to use a certain method, and costing another at a "go away" price.Nobody has gunite pools here. Almost all the pools in Ontario (and probably Canada) are vinyl, with some fiberglass pools getting common too (but nowhere near as common as vinyl). It is quite rare that someone would have gunite. I have no idea what gunite would cost, but a lot I'd imagine.