In terms of gameplay, not really. In terms of physics, a lot.
BtRL used a ve ry strange scaling system where 1m was actually 2.5m. The result being that ships had to travel much faster in order to keep things believable. Getting rid of that was one of the first things Diaspora did because it was completely screwing up our attempts to make anything with capships in.
Yeah, as i converted some ships for the intro video i noticed that a 1.6km long Battlestar isn't 1.6 km long ingame.
Of course, i noticed it
after i converted all the ships. My first thought on that was, i should reset the fov - i played with it a bit, but that didn't work.
My second thought was, i did something wrong during conversion, 'cause the BtRL Miner was almost as long as the BS.
As i made a new cockpit for the MkVII i noticed, that the ship is more then twice as long as it should be.
Thank the Lords, you don't use that system, 'cause flying over larger objects ( Capships, large Asteroids ( larger then the ones from the BtRL Demo ) landscapes - with mountains...) makes you feel like flying through bubblegum, i mean it's like you don't move at all.