Composite pool walls for vinyl liner pools are better in that they are 100% non-corrosive while still supplying the same amount of strength as a steel wall pool. While nature ensures that steel WILL rust over a period of time, the increasingly popular salt generators have accelerated this process. And why is rusting panels bad? Think of your vinyl liner moving up and down on a rusted piece of steel.
The answer depends on your needs. A composite toe cap is lighter, and does not conduct heat or cold as much as steel, but it can more expensive, smaller then steel toe caps. Both type meet the same safety standards, so are equally protective.
Galvanized steel. It lasts longer and is less affected by chemicals and saltwater if you choose to go that route. I do suggest saltwater. It needs for less maintance than a pure chlorine pool.
No, an oven being stainless steel does not make it work better than a non stainless steel version.
Copper is a better conductor of heat than steel.
All depends on what you are looking for and how much you have to spend. Concrete pools are usually considered the "high-end" pool but installation takes a long time and maintenance and repair are costly. Steel pools, or I'm assuming you're referring the vinyl liner pools, are a good, cost efficient option. Though, if you want to extend the life span of your pool, check out the other building materials used for vinyl liner pools.. such as Fiber Reinforced Composite Materials.
In above ground models, wood is much better than steel. If you "rough house" in a steel pool, you potentially could knock it down. It you run into it with a bike or lawn tractor you will likely know it down. A wood pool you could back your car into and not know it down. Wood you probably need to treat every 3 years, steel you don't, but it will rust. I don't have info on concrete.
One useful characteristic is that it is a lot lighter than steel.
Yes, steel has a much lower resistance than the human body therefore it will conduct better.
Yes, pure iron generally conducts electricity better than steel because steel is an alloy that contains iron and carbon. The carbon in steel can reduce its electrical conductivity compared to pure iron.
Composit toe shoes or boots will feel lighter than their steel toe counterparts.
Composite shims break off easier and cleaner than plain wood.
They are lighter than the old Steel ones, but not as light as aluminum/composite ones.