Resurfacing is a structural repair that will extend the useful life of your asphalt surface. It involves patching and resurfacing of the entire surface with a new overlay of 1 ½” to 3″ of hot bituminous asphalt.
Sealcoating is not a structural repair. Think of like painting your house. The sealcoat protects and extends the life of your asphalt, but does nothing to correct structural flaws.
Between two options, sealcoating is substantially less expensive than resurfacing your drive.