Ruby - Compare two Enumerators elegantly

I've got two long streams of numbers coming from two different sources (binary data) in Ruby (1.9.2).

The two sources are encapsulated in the form of two Enumerators.

I want to check that the two streams are exactly equal.

I've come with a couple solutions, but both seem quite inelegant.

The first one simply transforms both into an array:

def equal_streams?(s1, s2)
  s1.to_a == s2.to_a
end

This works, but it is not very performant, memory-wise, specially if the streams have lots of information.

The other option is... ugh.

def equal_streams?(s1, s2)
  s1.each do |e1|
    begin
      e2 = s2.next
      return false unless e1 == e2 # Different element found
    rescue StopIteration
      return false # s2 has run out of items before s1
    end
  end

  begin
    s2.next
  rescue StopIteration
    # s1 and s2 have run out of elements at the same time; they are equal
    return true
  end

  return false

end

So, is there a simpler, more elegant way of doing this?