Why use Colony Ship?

[Strategia_In_Ultima]

[Space Pirate]
Hail, ye planet-lubber and welcome 'board me ship!
[/Space Pirate]

Now, where it really gets interesting, is when you're using baseships as colonizers. They're especially handy for Ring/Sphereworlds, as they can drop a whole load of pop on there right away if you stick 'em full of Cargo Bays. Also, while they're underway, the enemy isn't likely to attack you.

Also, if you're under threat from a powerful enemy (say, most of your systems have planets belonging to the other player in them), Baseships have an added bonus when used as colonizers - if you stick only 1 colony module on them and no cargo bays, you can arm it to the teeth. That way, if an unsuspecting group of three enemy LCs attacks what it thinks to be a harmless colony ship,..... imagine the look on their faces when the colony ship blasts the first LC with a single volley.....

[Randallw]

Why would you use a baseship to colonise a ring/Sphereworld?. If you're at that level you should have plenty of large transports. I can see the reasons you mention but personally I wouldn't be sharing a system with someone I thought might attack me. Hell I generally won't even share a system with an ally