Preferred way to retrieve data with cake 3.0

Hi

I am making the move from cake 2.x to 3.x

I am starting a new project so figured this a good time.  I have been reading the book alot and its starting to make more sense.

I have been playing with different ways of retrieving my data and am a little confused as to the best practice method for retrieving data.

Coming from cake 2.0 This method is familiar to me:

// In a controller or table method.  $query = $articles->find('all', [      'conditions' => ['Articles.created >' => new DateTime('-10 days')],      'contain' => ['Authors', 'Comments'],      'limit' => 10  ]);

However, cake 3.0 seems to use this method as well

$query = $articles->find('all')      ->where(['Articles.created >' => new DateTime('-10 days')])      ->contain(['Comments', 'Authors'])      ->limit(10);

Is one "better" than the other?

Another quick question is how do I quickly identify if the above queries did not retrieve any data?  I used to check for an empty array on the returned results.  

Many Thanks!

Aaron

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