Laravel 5 eloquent query confusion

I have some confusion on what's the difference with this codes. I have been accustomed in using eloquent like

$users = User::all(); 

//OR

$users = User::get(); 

But I have some training and our trainer uses DB

$users = DB::table('users')->get() 

My question is which code is good to use and which is faster?

via Chebli Mohamed