At a guess, I'd say your Russia game is way more likely to get a decent amount of oil later on. Horses don't look very likely in either start position, but more likely for Brazil than for Russia. Iron and Coal are probably about equally likely, unless the computer takes into account hidden resources when establishing start locations. Overall, the Brazil game is obviously lightyears ahead in its Ancient, Classical and Medieval Eras. Russia absolutely has to take that City State, preferably before you start meeting other Civs, to avoid the diplomatic penalties. Archers asap. Your Brazil start might be land-locked, and I would be scared of being surrounded by hostiles. I'd be worried about Aztecs or other aggressive civs with early-era UUs, even if you didn't use the geographical "cultural link" option. Russia probably has a more defensible location, and is more likely to be bordered by the cold-weather Civs, which tend to have later UUs or be less aggressive (probably Mongolia would be your biggest worry, in that regard). Russia also has the sea at its door, so you'd have to make a meal out of that.
They made that tiny sliver into something larger much to the chagrin of Native Americans.
