As pen dragon said it's not clear cut though. The problem is that on iso with creative you want to get a few strong cities that will likely be spaced further apart, so tile-sharing is harder.I see: short term, you'll likely have an easier time cottage sharing, and long term you'll likely have a stronger capital. If you don't have these advantages, I guess you'll need to expand creatively in order to retain the time advantage (3 turns maybe) of SIP.