FNR==NR{
  arr[FNR]=$0
  next;
}
{
  f1num=split(arr[FNR], f1A, FS)
  if ( f1num != NF ) {
     printf("error: [%d] - unequal number of fields\n", FNR)
     next
  }
  for(i=1; i<=NF; i++)
    if (f1A[i] != $i)
     printf("error: [%d]::[%d] - non-equal fields: [%d != %d]\n", FNR, i, f1A[i]
, $i)
  split("", f1A)
}