On a very practical level the ordinance used could well be last minute adjustments based on any number of conditions. Generally the French, British, and US sources seem close enough. The intercept rate is something between the two claims? That is some versus none or most?
The Russian (and Syrian?) claim of additional airfields targeted is interesting. Since all additional site attacks were intercepted there is no visible or sensor evidence? Hmmm.
We really need independent sensor and satellite tracking of this stuff as all the players are untrustworthy.