(Continued)
At city size 20:
StW
Need 19 health and 15 happy
5 farmers, 15 specialists.
2

, 6

, 50

or 22

45:beaker:
Sanitation: only 4 farmers needed, so add another specialist (2

or 3 :beaker: -1

)
FoL
Need 1 health.
13 lumberjacks; 7 specialists.
1

, 14

, 62

or 48:hammers 21(28):beaker:
At city size 30:
StW
Need 29 health and 25 happy
7 farmers, 23(!) specialists.
0

, 8

, 78

or 32

69:beaker:
Sanitation: 1 extra specialists, +2

-1
FoL
Need 11 health and 5 happy
20 lumberjacks, 10 specialists.
2

, 21

, 112

or 92

30(40):beaker:
At city size 40:
StW
Need 39 health and 35 happy(!)
10 farmers, 30 specialists.
2

, 11

, 102

or 42

90:beaker: (120! with the Great Library).
Sanitation:
8 farmers, 32 specialists.
2

, 9

, 106

or 42:hammers 96:beaker: (128)
FoL
Can't support this size.
So, what does this all mean?
Well, first of, the StW will grow a lot faster, that's a given. Secondly, the StW is far easier to specialize. Think about a size 20 StW city, with only 4 farmers, the rest is plains/hill/mine. This would produce a size 20 102

! city. That is quite a bit, and almost on par with the

output of a size 30 FoL city.
A size 30 capital StW city under GodKing and 100% science, running nothing but merchants (all 24 of them) and farmers, have an income of 108 gold and a production of 48 hammers, and that is before any building modifier. Along with a decent holy city, and that city could pay for a rather large empire by itself.
It also means that Divination (life mana) and Alteration (enchantment mana) is quite a bit more important for a StW Calabim.
A StW Calabim also benefits a lot more from the Great Library, as the amount of specialists is huge.
Also, a StW Calabim city could, with enough health, reach a size of 100! from just farms (with sanitation).
And the agristo economy will help a lot in the start of the game, as we all know, but, as already noted, only helps until a certain point.
The FoL cities on the other hand, are less able to specialize, but are all well rounded. You can, and should, still specialize your cities, but can skimp on happy buildingsl.
But in the end, it means that you
have to play the map! Just like in every other CivIV game, the map determines how the optimal play will be. Do you start in a resource diverse floodplains map, or a map filled with nothing but forest and rivers?
If you can get enough resources, including life and enchantment mana, go the StW path.
RifE only:
A further analysis shows that the Financial trait is actually more beneficial for a FoL Calabim than for a StW Calabim.
Why? Because the point of StW is population, and thus a SE, where your

and :beaker: comes from specialists, not worked tiles.
Also, a FoL Calabim requires quite a lot more techs to really get going, as the lumbermill takes forever to build before iron working, and doesn't provide much until a certain point. However, when all required lumbermill techs and civics (industry helps alot) are taken, it beats StW in every department except when sacrificing pops to empower vamps.