Not really a big deal more corrosive but the answer is salt because of electrolysis.
Aside from the fact that chlorine is a corrosive substance there is no particular risk involved.
Chlorine is more abrasive for your skin. Salt is much more natural and better for you. But if you have a salt system in your pool, you are still producing chlorine.
A salt system makes chlorine, that's what its there for.
A salt system IS a chlorine system. Chlorine is still the sanitizer. The salt system is there so a chlorine generator can make the chlorine from the salt instead of you having to deal with it. There is no such thing as "best", only tradeoffs. A salt system is expensive even if you break it down per year (with initial and replacement costs). However much less maintenance. A salt system IS perfectly safe for a vinyl, or any type, pool.
Yes, because the chlorine ion is corrosive.
You first have to convert the pool to a chlorine system As a salt water system is a chlorine system.
Do you have a system installed at the equipment pad that will convert the salt to chlorine? If not, then NO!.
Yes you can
The ion chlorine from NaCl or CaCl2 is corrosive for metals (all type of vehicles) or roads.
A salt water pool is a chlorine pool, part of the salt is converted into chlorine electronically. I have found that regardless of the disinfection system used in a pool that the use of chlorine is the easiest and most reliable. The beauty with salt is the water fees better and you don't have to store and handle chlorine which is corrosive at best and explosive at worst. These day you can even go shopping for the type of salt you wish to use to benefit your health and the gardens around the pool.
Yes you can convert to a salt system. As you know a chemical component of salt is chlorine so it works just as well, however, unless you change the metals used on your stairs and other fixtures in and around your pool the salt water will be corrosive and you will see the effects in about 3 or 4 years of use. New pools being built with salt systems use metals that salt water will not corrode, such as brass.
No A salt water pool is in fact also chlorine pool, the difference being that with a salt water pool a salt water chlorinator converts the salt that is in the water into chlorine gas which is then dissolved into the water while the filter is running. the conversion wont have any adverse effects on the pool.