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I have never seen galvanized (zinc coated) aluminum roofing.
Steel roofing is generally either galvanized or it is coated with a coating called galvalume (a standard mixture of zinc and aluminum).
Colored steel roofing is generally galvalume coated with an air dried coating front and back or a baked on resin coating front and back or a combo.
Additionally I have never seen a standing seam aluminum roof.
I have seen standing seam galvanized steel roofs, at one time they were common, old construction up and down the Atlantic coast, and a few standing seam copper roofs, generally these were on high end dwellings or as accents on high end commercial buildings. And they are rare.
I have never seen a color coated copper roof. Generally a standing seam copper roof is bare and is allowed to weather to a natural color (patina). As Tom Toll pointed out, some copper roofing material has soldered seams. Soldered seams is generally an installation method encountered on older construction.
All it takes to determine whether the roof is steel or not is a magnet. I carry a strong rare earth magnet. If the metal is steel, a ferrous metal, the magnet will be attracted, if the roof is copper or aluminum, non-ferrous metals, the magnet will not be attracted.
Small rare earth magnets can be purchased at a fly fishing equipment supplier. A word of warning, magnets are effective at erasing credit cards and camera memory.
Another tool I carry on metal roof inspections is a micrometer. These can be purchased from Harbor Freight. I also carry a pair of metal shears, and inch pound torque wrench, a sharpie and some zip lock bags, for the same reason that Leland brought up. A 3M Scotchbrite pad is another tool I carry.
As Steve Beaumont said, it is unlikely that this is an expensive, standing seam copper roof. It is more likely that the roof is galvalume coated steel with a baked on resin coat for color. While it does have standing seams, the seams were pressed into the sheets at the factory before the sheets were installed. Tom Toll is correct in saying that if the metal is copper or steel and not soldered it should have stainless steel metal clips. Stainless is a shiny metal and galvanized is a dull gray color.
The price per square will depend on the thickness of the metal (gauge), the composition of the galvalume, the type of color coat (baked on resin or sprayed on paint), the layout of the roof (looks like a complicated roof) and whether or not it is on screeds or flat laid on the decking/sheathing.
"Prattling on and on about being an ass with experience doesn't make someone experienced. It just makes you an ass." Rod Buvens, Pilot grunt