Except this dichotomy exists only in your own mind, as you've been told in the past. For our purposes, the game is the universe. The Colossus was rammed by the remnants of the Repulse, and it suffered only minimal damage. Any speculation to the contrary is just fanon.
No.
Or are you saying that if you were to make a FS2 movie it would be exactly as the game?
No visible damage on ships, they just suddenly blow up? Same damage, same speeds, same balance? The move hero, the pilot, will collide with himself if he moves too far away from the battle?
There is the setting of a universe - the story, the background that in the head of the creator. It and the game play out a bit differently due to the game being a playing medium first, story medium second. You just can't pull off some thing as well in the game - or don't want to, for gameplay purposes.
Heck, the Repulse doesn't even ram the collie in all cases.
Remeber that Aten that rammed the Bastion in FS1? It did a lot of damage to it..and the size difference between it and hte Orion is bigger than the size difference between a collie and a orion.
That said, IF we are talking about any sort of realism and/or believabiltiy, the repulse would be utterly destroyed in a chrash with a collie. But the collie would suffer heavy damage. Anyone claiming the opposite is out of touch with reality.