A same meaning or not problem:
The lack of background to find the statistically stochastic variants has limited its performance due to significant recurrent noise and biological variability .
The lack of background to find the statistically significant recurring variants has limited its performance due to stochastic noise and biological variability .
****
[A]: no

A same meaning or not problem:
Antony Worrall Thompson said the pie was meant as a treat for children and was not intended for regular consumption .
Antony Worrall Thompson said that the cake was intended as a treat for children and was not meant for regular consumption .
****
[A]: yes

A same meaning or not problem:
The former has black marble and white stone shivlingas , while the latter has only white marble .
The former has white marble and black stone shivlingas , while the latter has only white marble ones .
****
[A]: no

A same meaning or not problem:
The United States , as a signatory , started foreign parcel services in 1887 but did not institute domestic services until 1913 .
The United States started foreign parcel services as a signatory in 1887 , but did not introduce domestic services until 1913 .
****
[A]:
yes