How to extract different element between two cell array?

I have two array

X1 = {'A','B','C','D'}

x2 = {'A','B','C','D','E','F','G','H'}

and I want to create a row having element not found in A i.e.

X3 ={ 'E','F','G','H'}

Answer 1

[Dave B]

How about using ismember combined with not (~)?

X1 = {'A','B','C','D'}

X1 = 1×4 cell array
    {'A'}    {'B'}    {'C'}    {'D'}

x2 = {'A','B','C','D','E','F','G','H'}

x2 = 1×8 cell array
    {'A'}    {'B'}    {'C'}    {'D'}    {'E'}    {'F'}    {'G'}    {'H'}

X3 = x2(~ismember(x2,X1))

X3 = 1×4 cell array
    {'E'}    {'F'}    {'G'}    {'H'}

[Aakriti Srivastava]

Sure I havent thought about that works well. Thanks