[1] https://www.reddit.com/r/AskEngineers/comments/wrv59o/what_a... [2] https://en.wikipedia.org/wiki/Electrofuel
If you go to the e-fuel page he links it says: "They are manufactured using captured carbon dioxide or carbon monoxide, together with hydrogen obtained from sustainable electricity sources" (and what's the efficiency in that process? less than making only H2 for certain)
Electrolysis efficiency can go up. Safety issues exists, but fossil fuels are only safe today due to major engineering work.
I think most investment in H2 is betting on it "just in case".
On the contrary, it will be more efficient overall because you skip the transporting/distributing that hydrogen to a destination. Assume that you can deliver e-fuels over existing pipelines.
In the end, it all depends how those numbers compare