what differentiates appropriate use of 'kind 42' vs. 'kind 1311' live/public chat message events?

are 1311 for short-term chats always intended to accompany some other event, while 42 have lasting duration around a particular topic?

#asknostr

nostr:npub1tlv67m7xvlyplzexuynmfpguvyet0sjffce3y8vu0suuyuwgzauqjk7fdm nostr:npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6 nostr:npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufzsevkk5s nostr:npub1qqqqqqyz0la2jjl752yv8h7wgs3v098mh9nztd4nr6gynaef6uqqt0n47m nostr:npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z