Unfortunately I couldn't find a website with a cross-numbered list.
Perhaps it isn't too hard to compare the following lists, even if the
second one is in Hungarian:

A list with DD (Denijs Dille) and Sz (Szöllősy) numbers:
http://www.cc.jyu.fi/~tojan/bartok/bbworks.htm

Here is a list (in Hungarian) with BB numbers (the list established by
László Somfai):
http://hu.wikipedia.org/wiki/BB

It seems that a new version of the BB list (Béla Bartók Thematic
Catalogue) is in preparation.

Hope this helps, Pierre