"we're going to" vs. "let's"

[shiqangpan]

Consider the conversation that comes from Cambridge Kid's Box

...

ALVIN: That's a really exciting job! I'm going to be a firefighter.

SHARI: Well, now we know what we're going to write about in this week's ezine – jobs!

DAN: Let's write about famous people's jobs!

Could DAN have said

we're going to write about famous people's jobs

?

[Josef Essberger]

Consider the conversation that comes from Cambridge Kid's Box

...

ALVIN: That's a really exciting job! I'm going to be a firefighter.

SHARI: Well, now we know what we're going to write about in this week's ezine – jobs!

DAN: Let's write about famous people's jobs!

Could DAN have said

we're going to write about famous people's jobs

?

Not really. They've just come up with the idea of writing about "jobs" and Dan is suggesting refining that to "famous people's jobs".

[shiqangpan]

Thank you.

I understand the "Dan suggesting famous people's jobs" part. I don't understand the difference between the two he might use

Let's write about famous people's jobs!

and

We're going to write about famous people's jobs!

Would you please explain it a little more?

[Josef Essberger]

Thank you.

I understand the "Dan suggesting famous people's jobs" part. I don't understand the difference between the two he might use

1. Let's write about famous people's jobs!

and

2. We're going to write about famous people's jobs!

Would you please explain it a little more?

1 is a suggestion
2 is a statement of fact