Compare two variables : Ho = difference is 0

#1
Hello,

This might be very trivial so please bear with me.

A = [a1 a2 a3 a4]
B = [b1 b2 b3 b4]

Ho = [A-B]^2 = 0 i.e. A and B are the same.

AND I also want to correct for False Discovery Rate (multiple comparisons) & report values (eg. [a3-b3]^2) that are significantly larger than 0.

Please advise,

S