They are highly similar. When I erred in Dispensationalism I would have considered myself a Ryrian (is that a term?) dispensationalist but 99% of what was in Scofield's Notes was "valid" for one who was Ryrian. Don't forget Scofield corrected some of his own errors between his 1909 and 1917 "Bibles" (i.e. his notes).

Grace is not common.