a soon-to-be-appointed high-level group

[Yoshihiro_1]

I know the rule that infinitive phrase modify a noun from the behind.
But it seems that sometimes they modify a noun from the front as stated below, using hyphens.
[infinitive phrase]
1. a high-level group soon to be appointed
2. a soon-to-be-appointed high-level group
When do we use 2. ?
What is the difference between 1. and 2. ?
Thank you in advance.

 

[Raymott]

I know the rule that infinitive phrase modify a noun from the behind.
But it seems that sometimes they modify a noun from the front as stated below, using hyphens.
[infinitive phrase]
1. a high-level group soon to be appointed
2. a soon-to-be-appointed high-level group
When do we use 2. ?
What is the difference between 1. and 2. ?
Thank you in advance.

Here is my freshly-thought-out and yet-to-be-independently-validated answer:
There's no difference in meaning. It's a purely stylistic choice which we use when it takes our fancy.