OSB is more uniform than plywood, can be manufactured into larger panels, is considered more environmentally friendly, and doesn't delaminate like plywood in hot climates. On the other hand, plywood is lighter, easier to work with, and puts less stress on the construction.
Sterling Board, Sterling OSB, Flakeboard, Aspenite, Smartply
OSB sheathing is more economical than plywood (approximately $700 less for a standard 2,400 square foot home).
Costs vary greatly by region (and even by zip code). To get free estimates from local contractors, please indicate yours.