Ok, I have a bunch of Studio Bergstrom Minis en route and need to start statting them up. Here are a few thoughts:

Armor (from Dreadnaughts) instead of shields.
I had no real firm idea of the Nu uGalactica size vs the size of nu Basestars until I reviewed the "Death Ride of the Pegasus" video.. Nu Pegasus Masses roughly double the Nu Base Star in my opinion. Since galactic was about 25% smaller than Pegasus, That puts the Nu Galactica roughly 25% more mass than a Nu Basestar.

While Basestars carry MUCH larger fighter groups, the fighters deploy more slowly than Galactica (Due to Galactica's Launch tubes. They actually leave the nu Basestar in larger numbers, but they are more slowly deployed.

Old Colonial Battlestars and Cylon Basestars should be about 20% lighter than their equivalent.

Cylons get +1 tech to their Engines
Colonials get +1 tech to their Guns

Battlestars have two types of anti-fighter batteries. Close in Antifighter batteries and "Barrier" Flak Turrets.

The Barrier Flak would be Arc: ABCDEF Range:3 Anti-Fighter Hit 3+ Imp:1 Dmg:1 Area Effect

Rather than use Strikers for Nukes I would say have them as Slow Firing; Minimum Range; Imp:1 Dmg: 5 Area of Effect weapons to speed play.

Nu Basestars would be armed with Long Range Missile launchers and nukes with minimal Point defense (Relying on Fighters for CAP)

Battlestars have fewer, better fighters, are larger, Have better defenses and HEAVY Arc: G Bow Guns.

Essentially, The Battlestars deploy the fighters to tie up the Cylon Fighter screen, then turn their nose to the Basestar and close, shredding it with heavy guns.

Cylons want to keep the range and overwhelm the battlestars with Long Range Missiles and nukes and Waves of Raiders.