So a Eurasia sized Continent that crosses the Equator, and a Americas sized continent laying E/W in the Northern Hemisphere. Suppose that Africa & Australian sized are in the South. With various
A Lot would depend on how close there were to each other.Asia is 6000 miles N/S, Americas is 12,000 N/S, leaving you with 6~7,000 miles to split between your East & West Oceans.
Also as the Americas are 45o Wide,were are your N & S Shores, 30o for the South Shore gives it a pleasant semi Tropical Climate but gives your North Shore Siberia conditions.
Conversely Temperate 50o for your North Shore gives you a Tropical South Shore.
Having said all that, Jarad's -Guns, Germs & Steel - [Discussed a lot on this Board] Says that your E/W continent will develop Fastest.