I'm changing my mind for the last time, I swear!

I'm leaning over to Soirana's side on the second city issue. I think I must have misplayed it bad the first time, because now I'm getting a marginally better start with ivory than fish. I've been thinking about long term potential, too, and it seems to me that, as a GP farm, ivory will be able to run one extra specialist compared to fish for some stretches of the game. Fish/iron could be a pretty decent hammer city at pop 6-7. Mainly though, I thought the two were incompatible, but I now think we should have cities in both those locations regardless of which comes first. Call me undecided and willing to go with either, but if I'm the swing vote we're most likely going with ivory.
1420 AD Stats (equivalent openings):
With ivory & bureau/serf/merc/pac:
Moscow Pop 7 Food 22/45 Settler 124/324 1fpt 29hpt 54bpt 3gpp Builds: work/work/warr/lib/lb/sett
Peter Pop 7 Food 23/45 Worker 32/81 7fpt 7hpt 20bpt 12gpp 72/135 GS Builds: wb/wb/warr/lib/wealth/work
Tech Nationalism 1239/2721; 74bpt
With fish & bureau/serf/merc/pac:
Moscow Pop 7 Food 30/45 Settler 95/324 5fpt 24hpt 45bpt 3gpp Builds: work/work/warr/lib/lb/sett
Peter Pop 7 Food 32/45 Worker 23/81 8fpt 11hpt 16bpt 12gpp 18/135 GS Builds: wb/wb/warr/lib/work
Tech Nationalism 1110/2721; 61bpt