The two are different. If you are catalyzing the polymerization of polyester alcohol and unsaturated polyester, the catalytic ability of stannous octanoate is stronger than that of tin isooctanoate, and the activity of octanoic acid is stronger than that of isooctanoic acid. Both of them have the same physical properties and are generally light yellow organic solvents. Please refer to the same as Tetraethyllead.