I doubt it. It's just the most known kr808d-1 model. A few months ago when Kr808d-1 models were mentioned, I think it was v4l or vapour king ones that were mentioned the most because they had a 10 second cut off.
Now that the volt
batteries are "sealed" on the top they are considered the best for slim automatic
batteries.
Other Kr808d-1 vendors are out there such as the halo g6, and what used to be hailed as the best - the bloog.
It also comes down to price. The volt ones are amongst the cheapest.
Just sound advice is why they're mentioned so often. If anyone was going to put me on their payroll it wouldn't be a site that sells slims because I always tell new starts specifically not to start with a slim battery like the kr808d-1 unless they're completely adamant they need one like that.
Though, I would say, that is only for cigarette lookalikes or "slim"
batteries. Otherwise, you'll find the exact same for bigger batteries; everyone will tell you to stat out with a riva/kgo or ego battery or just say why don't you just get something really powerful like the lavatube and provari.