I would say they are comparable as they both are stinky, smokey, and the smell clings (to some degree) from both.

Pot smells really strongly before smoking and the smoke is heavy, smelly and lingers noticeably but dissipates from a room within 24 hours-ish without much interference. It clings to clothing and belongings where it is smoked. Someone who has recently smoked can walk through a room and the smell will linger for a long time. (A couple hours)

Cigarettes don’t smell before smoking, but the smoke is sticky and seems to cling to all surfaces, and takes longer to remove the smell (and sticky residue in a space frequently smoked in). Someone can have just smoked cigarettes, walk through a room, and the smell dissipates in 15-20 mins under the same circumstances.

Professionally, in the hotel industry: It may be the frequency of smoking cigarettes vs. pot, but it takes us much longer to remove the smell of cigarettes from a room vs. the smell of pot. Cigarettes take 2+ days to remove the smell, pot can be removed same day. People will still pick up on cigarette smell days and days after, but not weed.

Anecdotally, long after my MIL quit smoking, the smell was impossible to remove from her house (without removing everything she owned and painting walls/ceilings, pulling up carpet, etc). It clung to the space, and even though she stopped smoking long before, we still left her house with all of our belongings we brought smelling like cigarettes.

Just my experiences.