Kinsler is better than Kirkland. I was watching both of them film and i don't know how they do the rating. But i look at their arm length and how they move their feet on the blocks. Kirkland has really slow feet. He makes blocks at last minute even in his highlight tape. Kinsler is aggressive and moves his feet as well as get to the 2nd level. I can see why it seems we are after Kinsler more than Kirkland. It could be bad weight for Kirkland but he seemed a step slow on his blocks.
And this is not to say these players cant go to the next level change their body and work ethic and be completely different, just their tape comparison