Looking on the internet deeply has found these results:

different from each other is the most popular phrase on the web.

opposite of each other 1371,000 results on the web	different from each other 164,200,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
But, we were sitting opposite each other... ...in the observation car. Robert? Promise we won't end up like those old married couples... sitting opposite each other at dinner with nothing to say. pronged arrangement. Vayhue served time at Oswald and says he barely knew Brass, though they did play opposite each other in a prison basketball game. The last time we sat opposite each other, it wasn't exactly my finest hour. Opposite each other, two sides stood: If you could be opposite each other on this three They're in the same place exactly opposite each other.	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

opposite of each other

1371,000 results on the web

different from each other

164,200,000 results on the web

More popular!

But, we were sitting opposite each other... ...in the observation car.
Robert? Promise we won't end up like those old married couples... sitting opposite each other at dinner with nothing to say.
pronged arrangement.
Vayhue served time at Oswald and says he barely knew Brass, though they did play opposite each other in a prison basketball game.
The last time we sat opposite each other, it wasn't exactly my finest hour.
Opposite each other, two sides stood:
If you could be opposite each other on this three
They're in the same place exactly opposite each other.

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.