Actually, I have very extensive experience with calcium chloride, loaded tires, tractors, and construction equipment in general over more years than I care to talk about.
Spend your money as you see fit.
It seems odd that most will swear by Kubota's recommendations for oil and such, yet consider the same engineers idiots when they recommend calcium chloride as a tire filler.
Any guess as to why calcium chloride is common? It works and it's cost effective. It would have been gone years ago if it caused problems. Methanol is certainly not a new discovery.
This is important in this discussion.
"Rust is a general term for a series of iron oxides, usually red oxides, formed by the reaction of iron and oxygen in the presence of water or air moisture." (Wikipedia)
Most common chemical form is Fe2O3.
Iron corrosion or rusting, will happen in the presence of beet juice, orange juice, methanol-water mix, calcium chloride or Budweiser as long as free oxygen is available. (Note that the above formula illustrates that rusting requires 3 molecules of oxygen for each 2 molecules of iron.) In a closed atmosphere such as a tire, the oxidation reaction is limited by the number of oxygen molecules available. Significant rusting requires large amounts of oxygen by volume. There's relatively little oxygen in a filled tire. Once the oxygen is reacted, the corrosion stops. The same quantity of oxygen is available in the tire no matter which of the above mentioned water based solutions is used. Therefore, the extent of rusting will be the same over the years. In any case, there's just not enough oxygen to react with enough steel to cause a problem.