A glimpse into gunite
features
The differences between gunite swimming pools and fiberglass pool?? (You
ask)

The dig is the same.
Fiberglass comes in standard shapes to choose from.
Gunite is free form, to your liking or best fit.
Fiberglass is less expensive and gunite is more time consuming. We as the
builder have no preference just as long as you the consumer are happy.

Both fiberglass and gunite have the ability for spas, tile, salt water
chlorination.

To sum it up three factors: Time, Price, Design.
1st step is the dig
2nd step rebar and plumbing
Gunite
Decking & Plaster