While true that both sets of notes look exactly the same when either IgG or IgM are clozed, the suggested change is a little problematic (“can cause other causes extravascular hemolysis” reads weirdly if the parenthetical is included).
Perhaps move some of the info from the extra to the text? Ig{{c2::M}}-mediated immune hemolytic anemia usually causes {{c1::extravascular}} hemolysis, but in severe cases, {{c1::intravascular}} hemolysis can also occur.