There is a small difference that, I believe, which might be exactly what you are talking about. This made more of an impact on the home run vs. the shorter swing. There is a saying when teaching hitting -- short to... long through. This means that at toe touch, your hands aren't going to be as far back in the stance. They get quick to the zone, but instead of pivoting with a rotation of the wrists, there is almost a sort of a push with the top hand.
If you pause the two videos above at the point of contact, the first one is further back in the zone while the second one is hit in front of the plate a little more. That is because he used more top hand power allowing the bat to snap better. This is more pronounced with some hitters (Freddy Freeman comes to mind).
By squaring up in front of the plate more allows the top hand to give more power on the plane of the ball. Frelick certainly did that here.
Go Crew!