node.js Error Callback Syntax

I'm a nodejs novice, and I'm looking for a little bit of guidance on style. I've got a simple route, that's calling the get function defined below:

var gameSchema = new Schema({
ExecutableName : String,
Name : String,
});

var Game = mongoose.model('games', gameSchema );

var get = function( id, func ) {

    Game.findById( id )
        .exec( function( err, doc ) {
            if( err ) {
                func( err );
            } else {
                func( null, doc );
            }
    });
};

Syntactically, I believe the function can be re-written as:

var get = function( id, func ) {

    Game.findById( id )
        .exec( function( err, doc ) {
            func( err, doc );
    });
};

From a style standpoint, is one method preferred over the other? For the sake of readability and reducing nesting, I like the second definition. However, I'd like to track with the prevailing style.