VX and Sarin are distinct organophosphorus nerve agents with well-established differences in their chemical structures and physical properties, making this a matter of common scientific knowledge.
The claim states that VX and Sarin have distinct chemical structures and physiological effects. This is a foundational fact of toxicology and pharmacology regarding chemical weapons (as implicitly supported by various properties and surrogates discussed in the literature, e.g., Paper [3] and [10]). Because it is a matter of basic scientific definition and well-documented everyday observation within the scientific community, no citation is needed.