Mathematica, 77 76 bytes
StringMatchQ[##,IgnoreCase->1>0]&@@(""<>Sort[Characters@#/." "->""]&/@{##})&
#Mathematica, 77 76 bytes#
StringMatchQ[##,IgnoreCase->1>0]&@@(""<>Sort[Characters@#/." "->""]&/@{##})&
TheThe first part is actually one of my answers to another question!