Blogger account linked with Google+ = Your Blogger account is linked to the respective (your) Google+ profile (both are in the same Google account and if you link them, Blogger automatically uses the Google+ profile in your Google account)
Blogger profile data = display name (changeable), profile photo (changeable, removable), publicly displayed email adress (changeable, hideable), username (unchangeable, the email adress of your Google account, not displayed publicly)
Blogger comment mode = Use Google+ Comments on this blog set to No
Google+ comment mode = Use Google+ Comments on this blog set to Yes
Comment type | General note | Blogger comment mode flags | Google+ comment mode flags | Blogger comment mode notes | Google+ comment mode notes |
---|---|---|---|---|---|
Blogger comment via Blogger profile | will always show your Blogger profile data from the time of commenting (won't change if you change your Blogger profile data, except if you change your profile photo, it will show an exclamation mark for replacement instead of your old profile photo but the image link still contains the name of the file you uploaded to be your profile photo), will link to your Blogger profile Bug: " " as Blogger profile display name will be displayed as "Anonymous" in Blogger comment mode and "" in Google+ comment mode. Clicking the profile picture would always link to the Blogger profile page. | creatable, viewable | viewable | ||
Blogger comment via Google(+) profile | Blogger profile data will become unused because linked to Google(+) | creatable, viewable | viewable | creatable, viewable, will always show your current profile photo and name fetched/retrieved from Google+ profile, but will link to your Blogger profile | will link to Google+ profile instead of Blogger profile |
Anonymous Blogger comment (no data or one-time Name/URL(optional) specification) | creatable, viewable | viewable | get a substitute profile photo (blue silhouette of a generic person) | ||
Google+ comment | Google+ profile necessary, comments won't get deleted in Blogger comment mode because they'll reappear if you switch back, but Blogger only allows Blogger comment mode since Feb 4th 2019 | hidden | creatable, viewable |
Google sucks at migrating/integrating and maintaining two services together and can't keep them coherent/cohesive... and they're bad at documentations, just take a look at all the confused (partly paying) "consumers" in the support forums!
Feb 4th 2019