You are able to grow your cities much faster. Is this because you have chosen better city locations, or maybe your start location has a more farmable neighborhood?
Well, the AI has never been known for choosing great city locations, so you're right. And the nature of this map doesn't help!

There is a new world order in Fury Road ... but the AI doesn't know that.
The AI sends out a Workboat to explore ... even though a fish resource remains unconnected.

There is a junkyard built on a desert tile ... even though a plains tile right next to it is unimproved.

The AI doesn't understand the importance of food in this mod.
If you had these exact areas to develop, what would you do differently?
Well, Christopher did draw the short stick when it comes to land. But not because of the land tiles, per se. But rather all of that ocean surrounding his peninsula. But, he could have done a better job settling to grab more land than water tiles. He also has an inland lake to provide fresh water, yet only 1 farm is chained. He could have provided irrigation to both of those cities had he understood farm chaining. Ironically, Christopher was the power leader for much of the game.
Mick has some better land but hasn't developed it. And he settles his 2
nd city in the middle of a dessert? His 3
rd city was up in the ice, judging from the road going north out of his capital. But, he's got a lot of green down south and plains to his west. With a nice long river running through his capital, getting fresh water shouldn't be a problem. My empire is to his west-SW and there is a lot of empty land between us. Its prime real estate compared to the ice and desert that he prioritized.
The other interesting thing to note about Christopher and Mick is they have that "farm preference" that you mentioned. Notice their capitals, they are a good size compared to IronHead's capital.
Now IronHead actually has some pretty good land (by Fury Road standards

). That swath of desert not withstanding, he has 2 good rivers to provide fresh water. But I don't think he's laid down a single farm or chopped a single tree. Except for the occasional cottage, the land looks mostly undeveloped. Makes me wonder if he lost his Workers to barbs?
or maybe your start location has a more farmable neighborhood?
I have a single river ambling through my capital and a wheat source. My 2
nd city had gold, but no food resources. It was close enough to my capital though, that I could set up a farm chain to bring in water. My 3
rd city was forested grassland. Once again, no food resource but quite a few ruins for production and cottages on the grassland. I normally wouldn't have prioritized this city, except that I was afraid Mick would beat me to it. Maybe if it had more ice, he would have.

My 4
th city picked up oil and seafood. Other than that, it is worthless. After that, I settled wheat and a bunch of ruins. It is my powerhouse production city. Fresh water is farm chained in from my capital. Otherwise junkyards on plains. More ruins and some seafood in my next city. Not many land tiles, but they are farmed with irrigation from my capital.
The other thing I should mention is that I try to keep around 2 or 4 forests around for the extra health. Otherwise, they all will eventually get chopped along with all of the jungle.