Do these sentences imply the same?

[Anatoly]

1A. Young man pushes his way to the top at the expense of his family.
1B. Young man pushes his way to the top to the detriment of his family
2A. They lived way beyond their means.
2B. They lived much more expensively than could be afforded.
3A He wanted 25% of the book on the grounds that he was the star of it.
3B. He wanted 25% of the book for the reason that he was the star of it.
4A Who bears the brunt of all that bottled frenetic activity?
4B. Who takes the strain of all that bottled frenetic activity?
I'm afraid, "B sentences " might be incorrect or not natural.
Thanks in advance!

[RonBee]

Commentary.

1A. Young man pushes his way to the top at the expense of his family.
1B. Young man pushes his way to the top to the detriment of his family

Those sentences mean pretty much the same thing. (Say "A young man...")

2A. They lived way beyond their means.
2B. They lived much more expensively than could be afforded.

Those sentences mean pretty much the same thing.

3A He wanted 25% of the book on the grounds that he was the star of it.
3B. He wanted 25% of the book for the reason that he was the star of it.

Those sentences mean pretty much the same thing. (You could also say "because he was the star of it".)

4A Who bears the brunt of all that bottled frenetic activity?
4B. Who takes the strain of all that bottled frenetic activity?

Those sentences mean pretty much the same thing. ("Bears the brunt" and "takes the strain" are not really synonymous tho.)

[Tdol]

They are all pretty much the same thing, although 2b sounds rather strained.