will be doing v.s. will do

[Lost_Soul]

Hi,

I'm trying to figure out the difference between "will be doing v.s. will do".Could you tell me if my interpretation of the sentences below holds water, please?

1.1. By the way, I won't be attending the meeting (I was not invited to atttend this meeting)
1.2. By the way, I won't attend the meeting (I think I will not go because I don't feel like attending this meeting)

2.1 I don't think I'll be going to the concert with them (They did not invite me)
2.2 I don't think I'll go to the concert with them (I don't want to go with them)

Any comments and improvements on the way I interpreted these sentences are highly appreciated :)

[Mister Micawber]

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False differentiations,　all of them. Wherever did you get those ideas? The difference is that the progressive in some way attaches greater commitment, interest, immediacy, etc. to the statement.
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Native English teacher at Mister Micawber's