collision detection in phaser

(these values were different)
game_objectA.sprite.getBounds().x
285
game_objectA.sprite.x
180

solution I did, but it may be slow I hacked together was making my own rectangle collision detection functions, here it is:
function intersectRect(s1, s2) {
    var r1={};
    var r2={};
    r1.top =  s1.y;
    r1.left = s1.x;
    r1.right = s1.x+s1.width;
    r1.bottom = s1.y+s1.height;
    r2.top =  s2.y;
    r2.left = s2.x;
    r2.right = s2.x+s2.width;
    r2.bottom = s2.y+s2.height;
    return !(   r2.left > r1.right ||
                r2.right < r1.left ||
                r2.top > r1.bottom ||
                r2.bottom < r1.top);
}