Industrial Zone:
- Major bonus (+2): Aqueduct (or Bath), Dam, and Canal
- Standard bonus (+1): Strategic Ressource, and Quarry.
- Minor bonus (+0.5): Districts, Mine and Lumber Mill.
I like the Industrial Zone. Contrary to other districts (except Theatre Square), the Industrial Zone gains more from city planning than ressource distribution. You gain satisfaction when you pull off a good Industrial Zone, like a City-Center / Harbor / Commercial Hub triangle, even more when you add Reyna with Harbomaster in the city.
They still have the ability to exploit ressource distribution, but in case there is nothing, you can still build the adjacency.
Hansa:
- Major bonus (+2): Aqueduct, Dam, Canal and Commercial Hub.
- Standard bonus (+1): All Ressources
- Minor bonus (+0.5): Districts
- Lost: Quarry (+1), Mine (+0.5), and Lumber Mill (+0.5)
The German might lose the Quarry, but since you can only put a Quarry over a Ressource, and all Ressources are giving standard adjacency, you are not losing anything. The adjacency kicks even earlier since you do not need to improve it to enjoy the adjacency! In fact, they only lose the minor adjacency from Mines and the Lumber Mills but gain a major one with Commercial Hub, and a standard one for all ressources (even Bonus and Luxury). In the end, Hansa might be a little more RNG, the odds of being worst than Industrial Zone is really slim. You really need to play on a New (world age), Sparse (ressources) and Wet (rainfall) maps to increase the odds of Hills without ressource and Lumber Mills.
In the end, the German have the better of both world: they can build the adjacency and take advantage of the ressource distribution.
Oppidum:
- Major bonus (+2): Strategic Ressource, and Quarry.
- Minor bonus (+0.5): Districts.
- Lost: Aqueduct (+2), Dam (+2), Canal (+2), Mine (+0.5), and Lumber Mill (+0.5).
- Can have Walls and Ranged Strike.
- Available at early Classical Era (need 3 Techs) instead of early Medieval Era (needs 6 Techs).
- One time: Give the Apprenticeship technology when built.
* : The Gallic ability prevent them to enjoy the minor bonus from District, but instead gain a minor bonus to Mines.
The Oppidum is now only dependant to ressource distribution. This means they can never build up their bonus by other means, contrary to standard Industrial Zone and Hansa. Furthermore, Strategic Ressources are hidden, so you need to reveal Horses and Iron fast to make sure you put the Oppidum accordingly (and pray for Niter / Coal... to magically appears next to them), while the Stone, Marbles and Gypsum ressources are really scarce (Marble and Gypsum are luxury ressources, so rely on the continent system, while Stone isn't common).
Contrary to the Industrial Zone, the Oppidum has situational adjacencies and nothing to rely on boosting the adjacency when no Quarry or Strategic Ressource are available. In the end, I am almost wishing for a Standard adjacency for Mines.
But the Oppidum is potent: its strength is not about how powerful it can be but how early it kicks and how you from there. After all, it is still a half cost district that can yields some decent Production, give you protection against early agression and prevent easy Pillage (no Science for invaders).
In the end, Oppidum is okay. It feels like a "wide-play" district where you build it when you have some lucky city, and this is where it shines the most. But as a Builder-type player, I can't hide my frustration that some of my Oppidum will be with low adjacency (or none).
The Hansa is better than the Oppidum, but not as much as I initially thougth. They do not have the same use:
- Hansa and Germany are the Production powerhouse that synergise well, thanks to the free district ability. Hansa allows to gain even more Production than the standard Industrial Zone, at half cost, but come "late".
- Oppidum and Gaul are the early Productive civilization that gain an early advantage, but due to the Gallic ability with districts limitation, there is some drawbacks. All depends if you manage to enjoy that early Production to snowball, since the Oppidum advantage is short-lived. At least, it gives some defense in the long run.