We are now beginning to enter the stage of the war where Russia is unable to sustain a general offensive all the way up and down the frontline and must resort to terrorism to project fear and the illusion of unstoppable, corrupted power.
Expect more and more of this crap as Russia is less and less able to credibly fight a ground war.
Remember, acts of terrorism definitionally rely on propaganda creating mass panic for their power as if the perpetrators of the terrorism possessed true power they would have resorted to actual coordinated military action such as fighting on the frontline or taking territory.
In otherwords if Russia chooses to attempt something like this, it is by definition a sign of extreme weakness on their part as was the lazy attempt to claim Ukraine tried to assassinate Putin.
From the top of my head some of them use different laquer that allows less loss on the fiber = longer distance travel on same battery with a bit bigger payload, they have universal mounts for payload, they have standartized a lot of things, they have just a lot more of them.
No one is debating that Russia has some advantage in fiber optic drones, the relevant question is whether we are talking about a horse race here or we are talking about Russia possessing a decisive advantage in fiber optic drones… and I don’t see concluisive evidence for the latter though I definitely acknowledge Russia is producing and fielding a massive number of them.