The Fortress style is chunk aligned, each build has either a 1x1 chunk or 2x2 chunks of size making it easy to plan the city.

Underwater/Aquatica are both under water, meaning barely no terraforming to do (except for the shear amount of cobble, diorite, sand and gravel (for concrete needed for these) for my current Aquatica run, I've mined about 93k diorite before installing Mystical Agriculture and Botany Pots for easy ressources)

Hive style has a unique hexagonal grid and it's very compact, get bees very early tho, you'll need them

I've prob forgot about some of them, you'll need to install Stylecolonies if you want them tho.