incognito shares state between tabs. temporary containers can have a fresh container for every tab, so your tabs are isolated. you can also use it in a way that

incognito shares state between tabs. temporary containers can have a fresh container for every tab, so your tabs are isolated. you can also use it in a way that by default every site you visit is using a temporary container, with certain urls set to use their corresponding long term containers -- if i go to github, it opens in a github container, if i click a link to some random dev's site, it opens in a temp container, etc. to provide context, i still use incognito, but i consider incognito mostly about hiding things from myself -- i use it almost exclusively for porn, because i don't want my porn habits in my browser suggestions. temporary tabs still land in the recent urls and such.