East coast usually has more steady rain and better soil. There are temperate coniferous rainforests in the west, but they mostly get their rain in the winter
Deciduous trees are more recently evolved, and grow faster
My favorite deciduous tree that competes with conifers on their home turf in the West is the aspen
>can get energy from sunlight through bark before leaves are out>grow as giant colonies from one root so when forest is burned they pop back up real quick>leaf has less drag to survive high winds>heaviest known organism and one of the oldesthttps://en.wikipedia.org/wiki/Pando_(tree) 
