IIRC there's 14 standard territories on General mud.
There's 10 standard territories on most 1v1s except crossroads and nexus in the 1v1 map pool.
This comes out to a 20% increase in fuel income though my numbers might be a bit off since it's been like a month since I looked into it. Factor in resource caches and you've got a massive difference in fuel incomes.
While the unit density does play a large role in balancing team games, standardizing the resources would make things an order of magnitude easier for balance, and it's really not that hard to do.
That depends on a map by map basis. While the stats are quite old, the game dynamics hasn't change that much so it would still be relevant.
https://www.coh2.org/topic/61229/resource-income-per-game-mode
Teamgames do end up getting more resources but the breaking point seems around pass the 12 min mark.
As i said before, the main problem with teamgames resources is that the income is steady and safe. The other problems such as caches, are kinda secondary. It would improve IMO if caches only rewarded the one who build them and anyone could "attach" themselves to an already existing cache by paying the same amount.