The successor rocket , the Falcon 9 , successfully landed its first stage on land on December 22 , 2015 , for the twentieth time .
The successor rocket , the Falcon 9 , landed its first stage successfully on land for the first time on its twentieth flight , on December 22 , 2015 .

Are these two sentences paraphrases of each other?
no

The river Tătaru is a tributary of the Buzăiel River in Romania .
The river Buzăiel is a tributary of the River Tătaru in Romania .

Are these two sentences paraphrases of each other?
no

In many provinces , mosques were bombed and Hui was slaughtered or destroyed by Japanese troops .
Mosques were bombed and in many provinces Hui were slaughtered by Japanese troops or destroyed .

Are these two sentences paraphrases of each other?
yes

There are 4 playable characters , each with a unique ability and a different style of fighting :
There are 4 playable characters , each with a different ability and also a unique fighting style .

Are these two sentences paraphrases of each other?

no