Tough one. One is a physical danger, the other is a spiritual danger. How do you say one is worse than another?
From a jewish p.o.v, it would seem that interne is worse, because it gets discussed amd banned much more frequently. However the Gedolim in quetion could be working under the assumption that it is so poshut that smoking is bad, that it doesn’t need to be said.
Lets leave it as any addiction (WHO’s definition of a addiction: a pathological relationship with a thing, person, or even that has life damaging consequences. Sam2, you’re not an internet addict 😉 ) is absolutely terrible.
I mean, whats worse, Heroin addiction or cigarette addiction?
Heroin kills 3000 people per year (in the UK) while cigarettes kill hundreds of thousands. It’s not our job to say which is worse. It’s our job to support and care for an addict however we can(NOT to enable him).